"Joanna I, also known as Johanna I (Italian: Giovanna I; 1326/1327 – 27 July 1382), was Queen of Naples, and Countess of Provence and Forcalquier from ...
1343 to 1382; she was also Princess of Achaea from 1373 to 1381. Joanna was the eldest daughter of Charles, Duke of Calabria and Marie of Valois to survive infancy. Her father was the son of Robert the Wise, King of Naples, but he died before his father in 1328. Three years later, King Robert appointed Joanna as his heir and ordered his vassals to swear fealty to her. To strengthen Joanna´s position, he concluded an agreement with his nephew, King Charles I of Hungary, about the marriage of Charles´s younger son, Andrew, and Joanna. Charles I also wanted to secure his uncle´s inheritance to Andrew, but King Robert named Joanna as his sole heir on his deathbed in 1343. He also appointed a regency council to govern his realms until Joanna´s 21st birthday, but the regents could not actually take control of state administration after the King´s death." - (en.wikipedia.org 28.12.2019)
