Source: The Washington Post By Matt Schudel The Rev. Dr. John T. Tavlarides, who spent more than 50 years as the senior priest and later dean of St. Sophia Greek Orthodox Cathedral in Washington, building it into one of the country’s most prominent Orthodox Christian congregations, died Sept. 21 at a hospital in Berlin, Md., near his vacation home in Ocean City, Md. He was 84. He had a heart ailment, said a son, Mark Tavlarides. Rev. Tavlarides arrived at St. Sophia in 1956 as the first American-born priest to serve at Washington’s oldest Greek Orthodox congregation. During his 55…