Brickell was founded in the mid-19th century, growing to become Miami's "Millionaire's Row" in the early 20th century after the construction of lavish mansions along Brickell Avenue by Mary Brickell; both the avenue and neighborhood were named for Ms. Brickell and her husband, William Brickell. By the 1970s, office towers, hotels and apartments began replacing the historic mansions. Brickell overtook the city's central business district to the north, as one of the largest financial districts in the United States. With a fast-growing residential population, Brickell is Miami's most dense neighborhood and home to the mall Brickell City Center and the Shops at Mary Brickell Village.