532-542 East 12th Street Building Date : N/A Original Use : Playground Original Owner : N/A Original Architect : N/A Description & Building Alterations This large lot is the site of a playground known as Joseph C. Sauer Park. It was once home to a seven-story tenement as well as a school building that can be seen on an 1867 map. The school, designed in a classical style, at one time was called P.S. 126 and is visible in a historic photo from 1931.