diff --git a/altair/vegalite/v3/api.py b/altair/vegalite/v3/api.py
index f844ef0f..b043680d 100644
--- a/altair/vegalite/v3/api.py
+++ b/altair/vegalite/v3/api.py
@@ -559,18 +559,6 @@ class TopLevelMixin(mixins.ConfigMethodMixin):
                 setattr(copy, key, val)
         return copy
 
-    def add_selection(self, *selections):
-        """Add one or more selections to the chart."""
-        if not selections:
-            return self
-        copy = self.copy(deep=['selection'])
-        if copy.selection is Undefined:
-            copy.selection = {}
-
-        for s in selections:
-            copy.selection[s.name] = s.selection
-        return copy
-
     def project(self, type='mercator', center=Undefined, clipAngle=Undefined, clipExtent=Undefined,
                 coefficient=Undefined, distance=Undefined, fraction=Undefined, lobes=Undefined,
                 parallel=Undefined, precision=Undefined, radius=Undefined, ratio=Undefined,
@@ -1561,6 +1549,18 @@ class Chart(TopLevelMixin, EncodingMixin, mixins.MarkMethodMixin,
         # As a last resort, try using the Root vegalite object
         return core.Root.from_dict(dct, validate)
 
+    def add_selection(self, *selections):
+        """Add one or more selections to the chart."""
+        if not selections:
+            return self
+        copy = self.copy(deep=['selection'])
+        if copy.selection is Undefined:
+            copy.selection = {}
+
+        for s in selections:
+            copy.selection[s.name] = s.selection
+        return copy
+
     def interactive(self, name=None, bind_x=True, bind_y=True):
         """Make chart axes scales interactive
 
@@ -1669,6 +1669,13 @@ class RepeatChart(TopLevelMixin, core.TopLevelRepeatSpec):
         copy.spec = copy.spec.interactive(name=name, bind_x=bind_x, bind_y=bind_y)
         return copy
 
+    def add_selection(self, *selections):
+        """Add one or more selections to the chart."""
+        if not selections or self.spec is Undefined:
+            return self
+        copy = self.copy()
+        copy.spec = copy.spec.add_selection(*selections)
+        return copy
 
 def repeat(repeater='repeat'):
     """Tie a channel to the row or column within a repeated chart
@@ -1712,6 +1719,15 @@ class ConcatChart(TopLevelMixin, core.TopLevelConcatSpec):
         copy |= other
         return copy
 
+    def add_selection(self, *selections):
+        """Add one or more selections to all subcharts."""
+        if not selections or not self.concat:
+            return self
+        copy = self.copy()
+        copy.concat = [chart.add_selection(*selections)
+                       for chart in copy.concat]
+        return copy
+
 
 def concat(*charts, **kwargs):
     """Concatenate charts horizontally"""
@@ -1739,6 +1755,15 @@ class HConcatChart(TopLevelMixin, core.TopLevelHConcatSpec):
         copy |= other
         return copy
 
+    def add_selection(self, *selections):
+        """Add one or more selections to all subcharts."""
+        if not selections or not self.hconcat:
+            return self
+        copy = self.copy()
+        copy.hconcat = [chart.add_selection(*selections)
+                        for chart in copy.hconcat]
+        return copy
+
 
 def hconcat(*charts, **kwargs):
     """Concatenate charts horizontally"""
@@ -1766,6 +1791,15 @@ class VConcatChart(TopLevelMixin, core.TopLevelVConcatSpec):
         copy &= other
         return copy
 
+    def add_selection(self, *selections):
+        """Add one or more selections to all subcharts."""
+        if not selections or not self.vconcat:
+            return self
+        copy = self.copy()
+        copy.vconcat = [chart.add_selection(*selections)
+                        for chart in copy.vconcat]
+        return copy
+
 
 def vconcat(*charts, **kwargs):
     """Concatenate charts vertically"""
@@ -1773,8 +1807,7 @@ def vconcat(*charts, **kwargs):
 
 
 @utils.use_signature(core.TopLevelLayerSpec)
-class LayerChart(TopLevelMixin, EncodingMixin, mixins.MarkMethodMixin,
-                 core.TopLevelLayerSpec):
+class LayerChart(TopLevelMixin, EncodingMixin, core.TopLevelLayerSpec):
     """A Chart with layers within a single panel"""
     def __init__(self, data=Undefined, layer=(), **kwargs):
         # TODO: move common data to top level?
@@ -1829,6 +1862,15 @@ class LayerChart(TopLevelMixin, EncodingMixin, mixins.MarkMethodMixin,
         copy.layer[0] = copy.layer[0].interactive(name=name, bind_x=bind_x, bind_y=bind_y)
         return copy
 
+    def add_selection(self, *selections):
+        """Add one or more selections to all subcharts."""
+        if not selections or not self.layer:
+            return self
+        copy = self.copy()
+        copy.layer = [chart.add_selection(*selections)
+                        for chart in copy.layer]
+        return copy
+
 
 def layer(*charts, **kwargs):
     """layer multiple charts"""
@@ -1865,6 +1907,14 @@ class FacetChart(TopLevelMixin, core.TopLevelFacetSpec):
         copy.spec = copy.spec.interactive(name=name, bind_x=bind_x, bind_y=bind_y)
         return copy
 
+    def add_selection(self, *selections):
+        """Add one or more selections to the chart."""
+        if not selections or self.spec is Undefined:
+            return self
+        copy = self.copy()
+        copy.spec = copy.spec.add_selection(*selections)
+        return copy
+
 
 def topo_feature(url, feature, **kwargs):
     """A convenience function for extracting features from a topojson url

BUG: Remove invalid methods from top-level chart objects
Examples of methods that never result in valid chart specs:

- ``LayerChart.mark_*``
- ``LayerChart.add_selection``
- ``*ConcatChart.add_selection``
- ``FacetChart.add_selection``
- ``RepeatChart.add_selection``
diff --git a/altair/vegalite/v3/tests/test_api.py b/altair/vegalite/v3/tests/test_api.py
index cae64b5e..f0e4b849 100644
--- a/altair/vegalite/v3/tests/test_api.py
+++ b/altair/vegalite/v3/tests/test_api.py
@@ -457,20 +457,6 @@ def test_resolve_methods():
     assert chart.resolve == alt.Resolve(scale=alt.ScaleResolveMap(x='shared', y='independent'))
 
 
-def test_layer_marks():
-    chart = alt.LayerChart().mark_point()
-    assert chart.mark == 'point'
-
-    chart = alt.LayerChart().mark_point(color='red')
-    assert chart.mark == alt.MarkDef('point', color='red')
-
-    chart = alt.LayerChart().mark_bar()
-    assert chart.mark == 'bar'
-
-    chart = alt.LayerChart().mark_bar(color='green')
-    assert chart.mark == alt.MarkDef('bar', color='green')
-
-
 def test_layer_encodings():
     chart = alt.LayerChart().encode(x='column:Q')
     assert chart.encoding.x == alt.X(shorthand='column:Q')
@@ -490,6 +476,34 @@ def test_add_selection():
     assert chart.selection == expected
 
 
+def test_repeat_add_selections():
+    base = alt.Chart('data.csv').mark_point()
+    selection = alt.selection_single()
+    chart1 = base.add_selection(selection).repeat(list('ABC'))
+    chart2 = base.repeat(list('ABC')).add_selection(selection)
+    assert chart1.to_dict() == chart2.to_dict()
+
+
+def test_facet_add_selections():
+    base = alt.Chart('data.csv').mark_point()
+    selection = alt.selection_single()
+    chart1 = base.add_selection(selection).facet('val:Q')
+    chart2 = base.facet('val:Q').add_selection(selection)
+    assert chart1.to_dict() == chart2.to_dict()
+
+
+@pytest.mark.parametrize('charttype', [alt.layer, alt.concat, alt.hconcat, alt.vconcat])
+def test_compound_add_selections(charttype):
+    base = alt.Chart('data.csv').mark_point()
+    selection = alt.selection_single()
+    chart1 = charttype(
+        base.add_selection(selection),
+        base.add_selection(selection)
+    )
+    chart2 = charttype(base, base).add_selection(selection)
+    assert chart1.to_dict() == chart2.to_dict()
+
+
 def test_selection_property():
     sel = alt.selection_interval()
     chart = alt.Chart('data.csv').mark_point().properties(

pip install -e .[dev]
parse_log_pytest
requirements.txt
pytest
3.6
requirements.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
alabaster==0.7.13
-e git+https://github.com/altair-viz/altair.git@079f8727deca3178089f5c2042145a60f874af1e#egg=altair
attrs==22.2.0
Babel==2.11.0
backcall==0.2.0
certifi==2021.5.30
charset-normalizer==2.0.12
commonmark==0.9.1
decorator==5.1.1
docutils==0.17.1
entrypoints==0.4
flake8==5.0.4
idna==3.10
imagesize==1.4.1
importlib-metadata==4.2.0
iniconfig==1.1.1
ipython==7.16.3
ipython-genutils==0.2.0
jedi==0.17.2
Jinja2==3.0.3
jsonschema==3.2.0
m2r==0.3.1
MarkupSafe==2.0.1
mccabe==0.7.0
mistune==0.8.4
numpy==1.19.5
packaging==21.3
pandas==1.1.5
parso==0.7.1
pexpect==4.9.0
pickleshare==0.7.5
pluggy==1.0.0
prompt-toolkit==3.0.36
ptyprocess==0.7.0
py==1.11.0
pycodestyle==2.9.1
pyflakes==2.5.0
Pygments==2.14.0
pyparsing==3.1.4
pyrsistent==0.18.0
pytest==7.0.1
python-dateutil==2.9.0.post0
pytz==2025.2
recommonmark==0.7.1
requests==2.27.1
six==1.17.0
snowballstemmer==2.2.0
Sphinx==4.3.2
sphinxcontrib-applehelp==1.0.2
sphinxcontrib-devhelp==1.0.2
sphinxcontrib-htmlhelp==2.0.0
sphinxcontrib-jsmath==1.0.1
sphinxcontrib-qthelp==1.0.3
sphinxcontrib-serializinghtml==1.1.5
tomli==1.2.3
toolz==0.12.0
traitlets==4.3.3
typing_extensions==4.1.1
urllib3==1.26.20
vega-datasets==0.9.0
wcwidth==0.2.13
zipp==3.6.0

name: altair
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2021.5.30=py36h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - pip=21.2.2=py36h06a4308_0
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - alabaster==0.7.13
      - attrs==22.2.0
      - babel==2.11.0
      - backcall==0.2.0
      - charset-normalizer==2.0.12
      - commonmark==0.9.1
      - decorator==5.1.1
      - docutils==0.17.1
      - entrypoints==0.4
      - flake8==5.0.4
      - idna==3.10
      - imagesize==1.4.1
      - importlib-metadata==4.2.0
      - iniconfig==1.1.1
      - ipython==7.16.3
      - ipython-genutils==0.2.0
      - jedi==0.17.2
      - jinja2==3.0.3
      - jsonschema==3.2.0
      - m2r==0.3.1
      - markupsafe==2.0.1
      - mccabe==0.7.0
      - mistune==0.8.4
      - numpy==1.19.5
      - packaging==21.3
      - pandas==1.1.5
      - parso==0.7.1
      - pexpect==4.9.0
      - pickleshare==0.7.5
      - pluggy==1.0.0
      - prompt-toolkit==3.0.36
      - ptyprocess==0.7.0
      - py==1.11.0
      - pycodestyle==2.9.1
      - pyflakes==2.5.0
      - pygments==2.14.0
      - pyparsing==3.1.4
      - pyrsistent==0.18.0
      - pytest==7.0.1
      - python-dateutil==2.9.0.post0
      - pytz==2025.2
      - recommonmark==0.7.1
      - requests==2.27.1
      - six==1.17.0
      - snowballstemmer==2.2.0
      - sphinx==4.3.2
      - sphinxcontrib-applehelp==1.0.2
      - sphinxcontrib-devhelp==1.0.2
      - sphinxcontrib-htmlhelp==2.0.0
      - sphinxcontrib-jsmath==1.0.1
      - sphinxcontrib-qthelp==1.0.3
      - sphinxcontrib-serializinghtml==1.1.5
      - tomli==1.2.3
      - toolz==0.12.0
      - traitlets==4.3.3
      - typing-extensions==4.1.1
      - urllib3==1.26.20
      - vega-datasets==0.9.0
      - wcwidth==0.2.13
      - zipp==3.6.0
prefix: /opt/conda/envs/altair

altair/vegalite/v3/tests/test_api.py::test_repeat_add_selections altair/vegalite/v3/tests/test_api.py::test_facet_add_selections altair/vegalite/v3/tests/test_api.py::test_compound_add_selections[layer] altair/vegalite/v3/tests/test_api.py::test_compound_add_selections[concat] altair/vegalite/v3/tests/test_api.py::test_compound_add_selections[hconcat] altair/vegalite/v3/tests/test_api.py::test_compound_add_selections[vconcat]
altair/vegalite/v3/tests/test_api.py::test_chart_data_types altair/vegalite/v3/tests/test_api.py::test_chart_infer_types altair/vegalite/v3/tests/test_api.py::test_multiple_encodings[args0-kwargs0] altair/vegalite/v3/tests/test_api.py::test_multiple_encodings[args1-kwargs1] altair/vegalite/v3/tests/test_api.py::test_multiple_encodings[args2-kwargs2] altair/vegalite/v3/tests/test_api.py::test_multiple_encodings[args3-kwargs3] altair/vegalite/v3/tests/test_api.py::test_multiple_encodings[args4-kwargs4] altair/vegalite/v3/tests/test_api.py::test_multiple_encodings[args5-kwargs5] altair/vegalite/v3/tests/test_api.py::test_chart_operations altair/vegalite/v3/tests/test_api.py::test_selection_to_dict altair/vegalite/v3/tests/test_api.py::test_selection_expression altair/vegalite/v3/tests/test_api.py::test_facet altair/vegalite/v3/tests/test_api.py::test_facet_parse altair/vegalite/v3/tests/test_api.py::test_facet_parse_data altair/vegalite/v3/tests/test_api.py::test_selection altair/vegalite/v3/tests/test_api.py::test_transforms altair/vegalite/v3/tests/test_api.py::test_filter_transform_selection_predicates altair/vegalite/v3/tests/test_api.py::test_resolve_methods altair/vegalite/v3/tests/test_api.py::test_layer_encodings altair/vegalite/v3/tests/test_api.py::test_add_selection altair/vegalite/v3/tests/test_api.py::test_selection_property altair/vegalite/v3/tests/test_api.py::test_LookupData altair/vegalite/v3/tests/test_api.py::test_themes altair/vegalite/v3/tests/test_api.py::test_chart_from_dict altair/vegalite/v3/tests/test_api.py::test_consolidate_datasets altair/vegalite/v3/tests/test_api.py::test_consolidate_InlineData altair/vegalite/v3/tests/test_api.py::test_deprecated_encodings altair/vegalite/v3/tests/test_api.py::test_repeat altair/vegalite/v3/tests/test_api.py::test_data_property altair/vegalite/v3/tests/test_api.py::test_subcharts_with_same_data[data.json-layer] altair/vegalite/v3/tests/test_api.py::test_subcharts_with_same_data[data.json-hconcat] altair/vegalite/v3/tests/test_api.py::test_subcharts_with_same_data[data.json-vconcat] altair/vegalite/v3/tests/test_api.py::test_subcharts_with_same_data[data.json-concat] altair/vegalite/v3/tests/test_api.py::test_subcharts_with_same_data[data1-layer] altair/vegalite/v3/tests/test_api.py::test_subcharts_with_same_data[data1-hconcat] altair/vegalite/v3/tests/test_api.py::test_subcharts_with_same_data[data1-vconcat] altair/vegalite/v3/tests/test_api.py::test_subcharts_with_same_data[data1-concat] altair/vegalite/v3/tests/test_api.py::test_subcharts_different_data[data.json-layer] altair/vegalite/v3/tests/test_api.py::test_subcharts_different_data[data.json-hconcat] altair/vegalite/v3/tests/test_api.py::test_subcharts_different_data[data.json-vconcat] altair/vegalite/v3/tests/test_api.py::test_subcharts_different_data[data.json-concat] altair/vegalite/v3/tests/test_api.py::test_subcharts_different_data[data1-layer] altair/vegalite/v3/tests/test_api.py::test_subcharts_different_data[data1-hconcat] altair/vegalite/v3/tests/test_api.py::test_subcharts_different_data[data1-vconcat] altair/vegalite/v3/tests/test_api.py::test_subcharts_different_data[data1-concat] altair/vegalite/v3/tests/test_api.py::test_layer_facet altair/vegalite/v3/tests/test_api.py::test_layer_errors
altair/vegalite/v3/api.py
altair/vegalite/v3/api.py