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Standing proudly on Main Street in Penn Yan is the anchor building of the Yates County History Center the Oliver House Museum one of four buildings comprising the YCHC. The Center formerly Yates County Genealogical Historical Society is one of the oldest in NYS has been actively collecting preserving and interpreting history since 1860. Continue reading about us. Childrens Room The youngest visitors to the Yates County History Center now have a fun filled room just for them.