The area's development continued after Charles Pratt, an oil executive, built a mansion at 232 Clinton Avenue, which is now part of the Brooklyn campus of St. Joseph's College's. Pratt also built houses there for his sons, which he gave to them as wedding gifts; other mansions followed, part of the general migration of merchants from New York City (Manhattan) to Brooklyn, and the area became known as Brooklyn's "Gold Coast". Pratt founded the Pratt Institute in 1887, and its campus remains a focus of the neighborhood.