He decided to sell his 50 % share in the Lucerna Palace on Wenceslas Square . This was a famous dance hall built by his grandfather VÃ clav Havel . Following a legal dispute with his sister-in-law , Havel decided to sell his 50 % stake in the Lucerna Palace on Wenceslas Square , a legendary dance hall built by his grandfather VÃ clav Havel .