On April 17th and 18th, Budapest will host the fifth annual celebration of 100-year old buildings in the city. Locals and tourists with maps will be wandering around to find 100 year-old houses and special celebrations arranged for the occasion. It was all initiated by young architects and artists from the Open Society Archives and the Hungarian Contemporary Architecture Centre. They asked the residents of such houses to let people in for a feast. On these days, everyone can peak into the buildings, admire the architecture, learn more at a specially arranged exhibition outside the houses and join informative tours (usually in Hungarian and English) getting an insider's view on the city. Budapest100 maps can be found all over Pest but if you miss them, visit the Open Society Archives, which is also a curious place to check.