Gábor Bethlen and the Treaty of Nagyszombat (1615)
Gábor Bethlen made efforts at establishing a diplomatic relationship with the king of Hungary immediately after his accession, for he was as aware as his predecessors that, alongside the support of the Sultan, he should also gain recognition from the ruler of the other empire, the head of the Habsburg Monarchy. It was at the end of a difficult and conflict-ridden series of negotiations that the treaty of Nagyszombat was signed on May 6, 1615. This put an end to the military and political hostilities which had thus far torn the regions along the frontier and thereby averted the outbreak of a major armed conflict. On the other hand, it determined the legal relationship between Transylvania and the Kingdom of Hungary until the anti-Habsburg campaign of Bethlen in 1619. In the secret agreement attached to the treaty Bethlen accepted the legal arrangement, first set out in the Treaty of Speyer in 1570 and subsequently confirmed several times by Bethlen’s princely predecessors, according to which Transylvania was a member (membrum) of the Hungarian Crown, and her prince exerted his authority there with the approval of the Hungarian king.