When the body moved to Philadelphia in 1790, and then to Washington, D.C., clergy from various Christian denominations ("mainline Protestant denominations--usually Episcopalians or Presbyterians") continued to be selected, delivering prayers and presiding at funerals and memorial services [REF].
Clergy have served in the official position of House Chaplain for all years since the office was created except for the brief period of 1855-1861 (and the Senate has had chaplains for every year except 1857-1859) [REF].