St. Eulalia of Mérida is a Christian martyr who lived in the early 4th century in Mérida, Spain. She is known for her steadfast faith during the Roman persecution of Christians. According to tradition, Eulalia was a young girl who refused to renounce her beliefs, leading to her brutal execution. Her story has inspired many, and she is venerated as the patron saint of Mérida. Eulalia's feast day is celebrated on December 10th, and she is often depicted in art with symbols of her martyrdom, such as a palm branch or a sword.