Outside the Russian Empire, in Constantinople, Peter Kharischirashvili (Pétre Kharistshirashvili) founded in 1861 two religious congregations of the Immaculate Conception, one for men, the other for women. These served Georgian Catholics living in the then capital of the Ottoman Empire. They also served in Montaubon, France. These congregations are long extinct, although some of their members were still alive in the late 1950s. The building that housed the male congregation, Fery-Quoa, still stands in Istanbul, now in private ownership. Their clergy gave Georgian Catholics in Constantinople the possibility to worship in accordance with the Georgian Byzantine rite, but they were under the authority of the local Latin Catholic bishop. The Georgian Catholic priest Michel Tamarati was the first to study the history of Catholicism in Georgia, eventually producing the oft-cited "L'Eglise géorgienne des origines jusqu' à nos jours" in French in 1911.