1541 treaty between Holy Roman Emperor Ferdinand I and Isabella Jagiellon
Tha Gyalu Castle where the treaty was signed
The Treaty of Gyalu[1] was an agreement between Holy Roman EmperorFerdinand I and Isabella Jagiellon the queen dowager of the Eastern Hungarian Kingdom and the widow of John Zápolya, signed in Gyalu (today Gilău, Romania) by Gáspár Serédy captain of Upper Hungary and János Statileo bishop of Transylvania on December 29, 1541.[2]
The participants tried to renegotiate John Sigismund Zápolya's possessions in connection with the previous Treaty of Nagyvárad. According to the treaty, Royal Hungary and the Eastern Hungarian Kingdom would have been re-united under Ferdinand's rule, in case he had recaptured Buda.[3] However, the Diet of Torda negotiated the Ottoman disapproval in reference to the treaty in October and refused to accept the terms of the agreement on December 20, 1542.[2]