After the death of his wife, Regina, aged 85, in Pöcking on 3 February 2010, Otto stopped appearing in public. He died at the age of 98 on Monday, 4 July 2011, at his home in Pöcking, Germany. His spokeswoman reported that he died "peacefully and without pain in his sleep". On 5 July, his body was laid in repose in the Church of St. Ulrich near his home in Pöcking, Bavaria, and a massive 13-day period of mourning started in several countries formerly part of Austria-Hungary. Otto's coffin was draped with the Habsburg flag decorated with the imperial–royal coats of arms of Austria and Hungary in addition to the Habsburg family coat of arms. In line with the Habsburg family tradition, Otto von Habsburg was buried in the family's crypt in Vienna, while his heart was buried in Pannonhalma Archabbey in Hungary.
After the death of his wife, Regina, aged 85 in Pöcking on 3 February 2010, Otto stopped appearing in public. He died at the age of 98 on Monday, 4 July 2011, at his home in Pöcking, Germany. His spokeswoman reported that he died "peacefully and without pain in his sleep". On 5 July, his body was laid in repose in the Church of St. Ulrich near his home in Pöcking, Bavaria, and a massive 13-day period of mourning started in several countries formerly part of Austria-Hungary. Otto's coffin was draped with the Habsburg flag decorated with the imperial–royal coats of arms of Austria and Hungary in addition to the Habsburg family coat of arms In line with the Habsburg family tradition, Otto von Habsburg was buried in the family's crypt in Vienna, while his heart was buried in Pannonhalma Archabbey in Hungary.