Explore the intricacies of orbital geometric frustration in moiré systems through this comprehensive lecture delivered by Eun-Ah Kim from Cornell University at the 2024 Princeton Summer School on Condensed Matter Physics (PSSCMP). Delve into the fascinating world of condensed matter physics as the speaker presents cutting-edge research and insights on this complex topic. Gain a deeper understanding of the fundamental principles and recent advancements in the field, with a specific focus on how geometric frustration affects orbital systems in moiré structures. Benefit from the expertise of a renowned researcher and engage with advanced concepts that are shaping the future of condensed matter physics.