Located in the Murray Hill neighborhood of Manhattan, St. Vartan Cathedral (Diocese) was conceived of for a number of years prior to its construction, until it was finally consecrated in 1968.
The architect for the church was the prominent Walker O. Cain (part of the architectural firm Steinman, Corrigill, Cain, and White), along with the Armenian architect Edward Utudjian of Paris acting as a consultant. The design of the cathedral is built to resemble the St. Hripsime Church in Armenia.
In 1978 the adjacent city park known as St. Gabriel's Park was renamed to St. Vartan Park. And in 1994 the church went through a major renovation with both its inside and outside receiving a fresh look all around.
For a very well produced, short and interesting documentary about the church please see the YouTube video Work of Art, Work of Faith produced by the Diocese in 2013 on the 45th anniversary of the church.