Grobiņa
...that at least 3,000 Vendel Age burial mounds in Grobiņa, Latvia indicate the existence of a prosperous Viking colony there?
...that at least 3,000 <a class="mw-redirect" href="./Vendel_Age" id="mwBeQ" rel="mw:WikiLink" title="Vendel Age">Vendel Age</a> <a class="mw-redirect" href="./Burial_mound" id="mwBeU" rel="mw:WikiLink" title="Burial mound">burial mounds</a> in <b id="mwBeY"><a href="./Grobiņa" id="mwBec" rel="mw:WikiLink" title="Grobiņa">Grobiņa</a></b>, <a href="./Latvia" id="mwBeg" rel="mw:WikiLink" title="Latvia">Latvia</a> indicate the existence of a prosperous <a class="mw-redirect" href="./Viking" id="mwBek" rel="mw:WikiLink" title="Viking">Viking</a> <a href="./Colony" id="mwBeo" rel="mw:WikiLink" title="Colony">colony</a> there?