St. Quirinus of Neuss was a Christian martyr and the patron saint of the city of Neuss in Germany. He is believed to have lived during the 3rd century and is often depicted in art as a bishop or a priest. His life is shrouded in legend, but he is venerated for his steadfast faith and dedication to spreading Christianity. According to tradition, St. Quirinus was executed for his beliefs, and his relics became a significant pilgrimage site. His feast day is celebrated on March 4th, and he is remembered for his role in the early Christian church and his influence in the region of Neuss.