Editing Selim II (section)

=== Treaties of Edirne and Speyer ===
In 1568, the [[Treaty of Adrianople (1568)|treaty of Edirne]] was concluded, after which the [[Habsburg]] [[Holy Roman Emperor]], [[Maximilian II, Holy Roman Emperor|Maximilian II]] recognised recent Ottoman conquests in Hungary and continued paying an annual tribute to the sultan. The longstanding Transylvanian issue, a source of conflicts between the Habsburgs and Ottomans, found resolution in the [[Treaty of Speyer (1570)|treaty of Speyer]] during the imperial diet in 1570. In this treaty, [[John Sigismund Zápolya]] relinquished his title as the elected king of Hungary, adopting the titles of prince of Transylvania and the adjacent parts of Hungary. Maximilian acknowledged these changes, and John Sigismund accepted Maximilian's suzerainty over his principality, which remained a part of the Holy Crown of Hungary. Despite this, the Transylvanian prince continued to be an Ottoman vassal. In essence, the Principality of Transylvania existed in a dual dependency, with its sovereignty constrained by both the sultan and the Habsburg kings of Hungary.<ref name="Ágoston">{{cite book | last=Ágoston | first=G. | title=The Last Muslim Conquest: The Ottoman Empire and Its Wars in Europe | publisher=Princeton University Press | year=2023 | isbn=978-0-691-20539-7 | page=247}}</ref>