After Radu's sudden death in 1475, Vlad III declared his third reign in 26 November 1476. Vlad began preparations for the reconquest of Wallachia in 1476 with Hungarian support. Vlad's third reign had lasted little more than two months when he was killed in battle against the Turks. The exact date of his death is unknown, presumably 31 October or the end of December 1476, but it is known that he was dead by 10 January 1477. The exact location of his death is also unknown, but it would have been somewhere along the road between Bucharest and Giurgiu. Vlad's head was taken to Constantinople as a trophy, and his body was buried unceremoniously by his rival, Basarab Laiota, possibly at Comana, a monastery founded by Vlad in 1461.[9] The Comana monastery was demolished and rebuilt from scratch in 1589.[10]