The Treaty of Gyalu was an agreement between

Holy Roman Emperor The Holy Roman Emperor, originally and officially the Emperor of the Romans ( la, Imperator Romanorum, german: Kaiser der Römer) during the Middle Ages, and also known as the Roman-German Emperor since the early modern period ( la, Imperat ...

Ferdinand I and

Isabella Jagiellon Isabella Jagiellon ( hu, Izabella királyné, links=no; pl, Izabela Jagiellonka, links=no; 18 January 1519 – 15 September 1559) was the Queen consort of Hungary. She was the oldest child of Polish King Sigismund I the Old, the Grand Duke of Lit ...

the queen dowager of the

Eastern Hungarian Kingdom The Eastern Hungarian Kingdom ( hu, keleti Magyar Királyság) is a modern term coined by some historians to designate the realm of John Zápolya and his son John Sigismund Zápolya, who contested the claims of the House of Habsburg to rule the ...

and the widow of John Zápolya, signed in Gyalu (today Gilău,

Romania Romania ( ; ro, România ) is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern, and Southeast Europe, Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, S ...

) by Gáspár Serédy captain of

Upper Hungary Upper Hungary is the usual English translation of ''Felvidék'' (literally: "Upland"), the Hungarian term for the area that was historically the northern part of the Kingdom of Hungary, now mostly present-day Slovakia. The region has also been ...

and János Statileo bishop of Transylvania on December 29, 1541.Hungarian Catholic Encyclopedia
/ref> The participants tried to renegotiate

John Sigismund Zápolya John Sigismund Zápolya or Szapolyai ( hu, Szapolyai János Zsigmond; 7 July 1540 – 14 March 1571) was King of Hungary as John II from 1540 to 1551 and from 1556 to 1570, and the first Prince of Transylvania, from 1570 to his death. He was ...

's possessions in connection with the previous

Treaty of Nagyvárad The Treaty of Nagyvárad (or Treaty of Grosswardein) was a secret peace agreement between Emperor Ferdinand I and John Szapolyai, rival claimants to the Kingdom of Hungary, signed in Grosswardein / Várad (modern-day Oradea, Romania) on February 2 ...

. According to the treaty,

Royal Hungary Royal may refer to: People * Royal (name), a list of people with either the surname or given name * A member of a royal family Places United States * Royal, Arkansas, an unincorporated community * Royal, Illinois, a village * Royal, Iowa, a cit ...

and the

would have been re-united under Ferdinand's rule, in case he had recaptured Buda. 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. The eastern territories of the former

medieval Kingdom of Hungary The Kingdom of Hungary was a monarchy in Central Europe that existed for nearly a millennium, from the Middle Ages into the 20th century. The Principality of Hungary emerged as a Christian kingdom upon the coronation of the first king Stephen ...

ruled by King

were known as the Eastern Hungarian Kingdom until the Treaty of Speyer (1570).Richard C. Frucht
Eastern Europe: An Introduction to the People, Lands, and Culture, Volume 1
ABC-CLIO, 2004, p. 408

References

Gyalu Gyalu Principality of Transylvania (1570–1711) 1541 treaties 1541 in the Holy Roman Empire Eastern Hungarian Kingdom Ferdinand I, Holy Roman Emperor {{treaty-stub