The Municipal Art Society of New York (MAS) is a Manhattan-based civic organization focused on planning, policy, and historic preservation across New York City, describing its mission as educating and inspiring New Yorkers toward a more livable city "from sidewalk to skyline." Founded in the 1890s, MAS has for over a century advocated for the city's built environment through public tours of landmark sites, community education, and policy testimony. Its current initiatives include the Alliance for Public Space Leadership, the Data Distillery project on climate risk to historic buildings, and the Enduring Culture program supporting the city's diverse cultural heritage.