Rebellions aimed at restoration of the Bulgarian state broke out. The first rebellion rose in Belgrade in 1040. It was headed by Petar Deljan, grandson of Tsar Samuel. This was followed by several more uprisings: Uprising in Thessaly (1066) led by Nikoulitzas Delphinas; Uprising of Georgi Voyteh; Uprising in Paristrion, and the revolts of Dobromir in Mesembria and Leka in Sredets (today Sofia) in 1079. After the coming to power of the Comnenus, the Bulgarian uprisings subsided, due to the integration of the old Bulgarian aristocracy in the rule of the empire, as seen in the writings of Anna Komnene about her grandmother Maria of Bulgaria in "Alexiad".