Wikipedia: Samuel D. Gruber is an American art and architectural historian and historic preservationist. He has written extensively on the architecture of the synagogue and is an expert and activist in the documentation, protection and preservation of historic Jewish sites and monuments. He was born in Norristown, Pennsylvania and lives in Syracuse, New York. […] In the decade and a half following the fall of Communism in Central and Eastern Europe (1990-2005), Gruber organized and supervised for the World Monuments Fund and the U.S. Commission more than a dozen countrywide surveys of cultural heritage sites of significance to religious and ethnic minorities. These identified, mostly for the first time, thousands of previously unrecognized and undocumented synagogues, churches, mosques, cemeteries and Holocaust-related sites, almost all of which were visited and by survey teams that described their condition. These projects included full or partial surveys of Jewish sites in Bosnia and Herzegovina, Bulgaria, The Czech Republic, Estonia, Hungary, Latvia, Lithuania, Moldova, Poland, Romania, Slovakia, Slovenia, and Ukraine; Roma sites in Poland; Old Believers sites in Lithuania; and Protestant Christian and Muslim sites in Bulgaria.