PIRSA, the Perimeter Institute Recorded Seminar Archive, is an online resource for exploring talks and collections connected with theoretical physics and related research. Its searchable catalogue covers subjects including condensed matter, cosmology, mathematical physics, particle physics, quantum fields and strings, quantum foundations, quantum gravity, quantum information, and strong gravity, alongside other topics. Visitors can browse seminar series and filter results by search terms, speaker, date, subject, title, or talk type, making it easier to find material of interest.

The archive includes conferences and schools, courses, outreach series, public lectures, and scientific series. Its navigation also highlights resources for researchers, students, and the public, reflecting an audience that extends beyond specialists. Users can sign up for updates from Perimeter.

PIRSA provides a structured way to discover recorded seminar content and collections, bringing together a broad range of presentations within a searchable archive. Its focused subject categories and browsing tools help visitors navigate the programme and locate talks across multiple areas of physics