Before Tudor City, tenements and slums dominated the area, which bordered a power plant and slaughterhouses, along First Avenue on the East River. It was known as "Goat Hill" (goats and squatters ruled the area) and later "Prospect Hill". The area eventually developed into a shanty Irish community known as "Corcoran's Roost", founded by Jimmy Corcoran, in the 1850s and later became known as a community with a high rate of violent crime and a haven for waterfront thieves, most notably the Rag Gang, during the late 19th century.