 Complete the following phrase:  From December 1663, when Grigore I Ghica ordered Constantin Is execution at Snagov Monastery, the Wallachian Cantacuzinos were also at the center of a latent civil war, opposing them to the descendants of Andonikos co-regent, Udrea Băleanu. The Cantacuzino program was partly fulfilled in the 1680s, when Șerban reigned as Prince. However, Cantemir and other early historians claim that he was killed by his own brothers, who resented his attempts to realign Wallachia with the Holy Roman Empire. The renewed conflict also involved on the Cantacuzino side the Craiovești: their leader, Constantin Brâncoveanu, was Andronikos great-grandson on his mothers side. The family returned to favor under Brâncoveanus reign, which ended with a reassertion of Ottoman control, and the Princes execution, following the 