The 2026 MITP Summer School on the theme "Topics in Theoretical and Mathematical Physics" will feature leading experts in diverse topics of theoretical and mathematical physics addressing advanced graduate students in theoretical high-energy physics. We expect to accommodate ~50 students from around the world at the Erbacher Hof in downtown Mainz. The registration fee will include shared-room housing at the Erbacher Hof, full board for the weekdays and breakfast on the weekend, as well as a...