Lucerna is a glass-roofed passage cut straight through a city block, and hanging head-down in its atrium is a horse with St Wenceslas sitting on its belly. David Černý made it. The block it cuts through stands just off Wenceslas Square, where the upright saint it answers is. Around the passage are a cinema, a ballroom, offices and shops, all reached off the same corridor. The hall below has held boxing matches, balls and several generations of Czech popular music, and it is still in use.
The man who built it was Vácslav Havel, and it took him fourteen years, from 1907 to 1921, with Stanislav Bechyně as his engineer. It was the first arcade building in Prague: a public route cut through a private block and roofed in glass. His grandson Václav was born into the family in 1936. When the state took everything in 1948 that inheritance turned into a mark against him, and being a builder's grandson was enough to keep him out of university. Cut through it today and it is still doing that job: most people crossing the block are not looking at anything.