The Steinert Building on Boylston Street in Boston is one of the citys most iconic and mysterious buildings. The Beaux Arts style building was constructed in 1894 from plans by architects Winslow & Wetherell and contained three floors of display rooms, three floors of teaching studios and practice rooms. The building is arguably best-known for the 650-seat Steinert Hall, a basement concert hall constructed 35 under ground and considered by some to be one of the most perfect concert halls, acoustically, in the U.S. The building was constructed as the national headquarters for the prestigious firm of M. Steinert & Sons, one of the largest and finest music stores in New England. Established in 1860 by Morris Steinert, a Bavarian musician, musical instrument collector and founder of the New Haven Symphony (originally Steinerts Family Orchestra). The company was expanded under his second son, Alexander Steinert, who had the Steinert Building in Boston built, requiring a music hall to showcase musicians and their products. The subterranean concert hall closed in the 1940s, following the 1942 Cocoanut Grove fire, the third-deadliest building fire in American history, which resulted in deaths of 492 people. This tragedy inspired an entirely new set of building and fire codes throughout the city; which ultimately would close Steinert Hall, as it had only one means of egress, making it too cost-prohibitive to bring the theatre into compliance.The building was long-operated as a piano showroom, but closed in 2017 and has been vacant ever-since. The basement music hall remains frozen in time, awaiting a new life.