May Avenue is an avenue in Buenos Aires, Argentina, where many historic buildings are located. When it was designed in the 19th century, it was inspired by Gran V&7; a shopping street in downtown Madrid, Spain. It connects May Square at one end and Plaza del Congreso at the other. May Avenue is 30 meters wide, initially strictly stipulated, the height of buildings along the street is limited to 24 meters. Barolo Palace is the first exception. In 1997, this avenue was listed as a national historic site, and any changes must be approved by the Commission on Monuments and Historical Sites.