ancestry and tended to be in lower economic classes. During the colonial era, it was typical practice for Portuguese priests and missionaries to baptize converted African slaves and Native Americans with surnames of religious connotations. These have been passed down to their descendants. A 2015 autosomal DNA study found out the following ancestral composition in Salvador: 50.5% of African ancestry, 42.4% of European ancestry and 5.8% of Native American ancestry. The researchers explained they oversampled individuals living in poor environments (page 4). Another 2015 autosomal DNA found out Salvador to be 50.8% African, 42.9% European and 6.4% Native American. And another autosomal DNA study, also in 2015, found out Salvador to be: 50.8% European, 40.5% African and 8.7% Native American. Population growth Changing demographics of the city of Salvador Source: Planet Barsa Ltda. Religion In Salvador, religion is a major contact point between Portuguese and African influences and, in the last 20 years, Brazil's version of a North American-influenced Pentecostalism. Salvador was the seat of the first bishopric in colonial Brazil (established 1551), and the first bishop, Pero Fernandes Sardinha, arrived already in 1552. The Jesuits, led by the Manuel da Nóbrega, also arrived in the 16th century and worked in converting the Indigenous peoples of the region to Roman Catholicism. Many religious orders came to the city, following its foundation: Franciscans, Benedictines and Carmelites. Subsequently, to them are created the Third Orders, the Brotherhoods, and Fraternities, which were composed mainly of professional and social groups. The most prominent of these orders were the Terceira do Carmo Order and the de São Francisco Order, founded by white men, and the Nossa Senhora do Rosário and São Beneditino Brotherhoods, composed of black men. In many churches maintained by religious men, were housed the Santíssimo Sacramento brotherhoods. Besides these organizations, the expansion of Catholicism in the city was consolidated through social care work. Santa Casa the Misericórdia was one of the institution that did this kind of work, maintaining hospitals, shelters for the poor and the elderly, as well providing assistance to convicts and to those who would face death penalties. The convents, on their part, were cultural and religious formation centers, offering seminar coursed that often were attended by the lay. Even with the present evolution, and the growth of Protestantism and other religions in the city, the Catholic faith remains as one of its most distinctive features, drawing a lot