On Sundays, you can get a ticket to all Pinakotheken, including the Pinakothek der Moderne, for just 1 € – definitely worth a visit if you’re okay with it getting busier than usual.
Description (taken from the official website)
With four major museums under one roof, the PINAKOTHEK DER MODERNE is one of the largest museums in the world for art, architecture and design of the 20th and 21st centuries. The architecture of the spacious building with the glass-roofed rotunda invites visitors to explore links between the museums and gain new and surprising insights. Exhibitions and events from a variety of cultural fields complete the interdisciplinary agenda.