Sitting in Eastern Brooklyn, Brownsville has a long history. But how did the neighborhood develop? Its story begins with a small church in East New York.

ca. 1890 Construction on the six tenements that would become known as the Mott Street Barracks began in the 1850s. Begun by stonemason Martin Walsh, a recent Irish immigrant, the tenements would become one of the most notorious in the city. Each floor had two small apartments. These apartments, in turn, were made up of three rooms, with only one window. Moreover, these windows were overshadowed in all the back apartments by the construction of a second set of structures, directly behind the street-facing tenements. (the photo depicts the narrow alley between the two.) The dark, cramped corridors and apartments of the Mott Street Barracks soon became home to a host of pests, rodents, and disease. The lodgings didn't have plumbing so the waste and outhouses were emptied in the cellar. Filth and refuse crowded the entrances and ground. The child mortality rate at Mott Street was so high that Riis claimed that one in three children died. Moreover, the barracks were no stranger to violent crime. Robberies were fairly common and a series of murders and gang fights secured Mott Street's notoriety beyond its filthy conditions. Following a series of increasingly irate complaints by the health department, Mott Street's owner repainted the tenements and added a new cornice, but the changes were skin deep. Otherwise, the buildings remained the same. In 1896, the Health Department seized the buildings, offering one dollar in compensation. Initially razing the back buildings, it soon became clear that there was no improving the barracks, and the entirety of the tenements was demolished.

On June 5th, 1870 Jacob Riis arrived in New York with 40$ and a revolver. Riis was one of the millions of immigrants arriving on the shores of the United States at the end of the 19th century. Seeking a better life, the immigrants were packed into the tenements and slums of New York. In the 1880s, the Lower East Side was the most densely populated place in the world. Riis's documentation of the inhabitants of these neighborhoods would make him famous and drive a reformist movement.