Greek Orthodox Cathedral of Sts . Constantine and Helen , more simply Sts . Constantine and Helen Cathedral ( though known by Greek Orthodox parishioners from other churches as NAK ) is a Greek Orthodox cathedral church at 64 Schermerhorn Street in downtown Brooklyn , New York . It is best known for taking in parishioners from St. Nicholas Greek Orthodox Church in Manhattan , destroyed during the September 11 attacks
September 11 attacks
September 11 attacks
Sts. Constantine and Helen Greek Orthodox Cathedral