The document is a thesis presented by Joanna April De Leon Lumbad to the faculty of St. Scholastica's College, Manila in partial fulfillment of the requirements for a Bachelor of Science degree in Interior Design. The thesis examines defining the Filipino cultural identity through Filipino avant-garde in performing arts theater. It discusses the history of performing arts theaters in the Philippines and how their styles have adapted to different design movements over time. The thesis also reviews related literature on the topic and proposes using an avant-garde concept in the design of a new performing arts theater to help develop a uniquely Filipino style.