Kevorkian carried out excavations in Persia, in Sultanabad from 1903 and at the medieval city of Rey from around 1907, and assembled an outstanding collection of Oriental art, especially Islamic and Persian. He organized the exhibition of Islamic ceramics in London in 1911. The works excavated under his supervision were shown in New York in 1914. Major sales of Islamic pieces from his collection, including lacquer doors and tile panels from Isfahan, books and paintings, carpets and ceramics, were held in the 1920s at the Anderson Gallery, New York.
