Princess Milica of Serbia
Milica (c. 1335–1405), daughter of Prince Vratko of a collateral branch of the Nemanjić dynasty, married Prince Lazar Hrebeljanović. When Lazar fell at Kosovo Polje in 1389, she ruled Serbia as regent for their son Stefan Lazarević until he came of age in 1393.
The first months were the worst: Sigismund's Hungarians took northern fortresses and reached Kragujevac, Vuk Branković tried to unseat her, and when the Ottomans reached her border in the summer of 1390 she accepted their suzerainty and let them pass freely through her lands.
She founded Ljubostinja monastery about 1390 and took the veil there around 1393 as the nun Eugenia. In 1403 she went to the sultan at Serres to argue for Stefan in a dispute between her sons and Branković. She died on 11 November 1405, was buried at Ljubostinja and was canonised.