Ștefan Tomșa was claimed the ruler of Moldavia on 8 August 1563.[2] Suceava fell to Ştefan Tomșa's forces in October 1563, and the new ruler killed his predecessor with a mace.
Ștefan Tomșa defeated an invasion by the neighbouring Wallachian prince Petru cel Tânăr, but was unable to obtain recognition by the Ottoman Empire as ruler of Wallachia. Alexandru Lăpușneanu, who had been deposed by Ioan Iacob in 1561, was returned to power with Ottoman assistance in January 1564,[1] and Ștefan Tomșa fled to neighbouring Poland.[1]
Tomșa was imprisoned with his boyars in Buczacz.[1] On the request of the Sultan boyars were sent to Turkey.[1] The Sultan wanted also Ștefan Tomșa.[1] Tomșa on the request of the Polish King Sigismund II Augustus was sentenced to death and beheaded in Lwów on 5 May 1564.[1] He was buried in Lwów.
His sons were later rulers of the principalities, Ștefan IX Tomșa in Moldavia, and Leon Tomșa in Wallachia.
