The culture of Philadelphia goes back to 1682 when Philadelphia, Pennsylvania was founded by William Penn. Originally inhabited by the Lenape, Philadelphia was envisioned as a place where people could live without fear of persecution because of their religion. As a result, many Quakers, Mennonites, and others came to find refuge within the city. As Philadelphia grew into a major political and economic center of the United States, many different groups of religions and ethnicities flocked to the city. 19th and 20th century immigration and migration led to large concentrations of Irish, Italians, Germans, Asians, Puerto Ricans and African Americans. Philadelphia is still a major center of immigration, with large Chinese, Vietnamese, Korean, East African, Middle Eastern, Indian and Mexican immigrant populations, among others.