Sor Sança (d. circa 1401) was a Beguine in Barcelona and a companion of St. Birgitta of Sweden in Rome. She held significant influence in medieval Barcelona, receiving royal patronage and privileges, such as the authority to bury executed criminals. Her possession of Birgitta’s relics highlighted her spiritual prestige and connection to Birgittine networks. Sor Sança’s role as a foundational figure for Sant Maties de Barcelona, which regulated a previously existing beguine community, underscores the concept of affective communities, where devotion, material culture, and personal ties fostered cohesion. Her legacy reflects the vital role women played in sustaining religious life and bridging spiritual and civic responsibilities.