Central Brooklyn Landmarked Erasmus Hall Academy Building No Longer In Danger of Demolition By Neglect Erasmus Academy in 1879. (Image: The Brooklyn Museum)FLATBUSH – The original Erasmus Hall Academy building in the school’s courtyard at 911 Flatbush Avenue is not only one of the borough’s oldest buildings, but also one of its most historically significant. The 1786 structure, which for many years was