On December 24, 1933, a group of assassins attacked Eastern Diocese Archbishop Levon Tourian as he walked down the aisle of Holy Cross Armenian Church in the Washington Heights neighborhood of New York City during the Divine Liturgy, and killed him with a butcher knife. Nine Tashnags were later arrested, tried and convicted. The incident divided the Armenian community, as Tashnag sympathizers established congregations independent of Mother See of Holy Etchmiadzin, declaring loyalty instead to the Holy See of Cilicia based in Antelias, Lebanon.[4][5]
After the assassination, the church was reconsecrated, with a new crypt added in 1934 to designs by Manoug Exerjian, who also refaced and renovated the church between 1952 and 1953.[2]