Igreja Matriz São Sebastião (Chapel of Saint Sebastian) is located within the town of Guia, Algarve, Portugal. It is thought the first chapel located here was built in the early 17 century. That original chapel collapsed in the 1755 earthquake, but was rebuilt on the present three years later. The chapel is dedicated to São Sebastião, who played an important part in the eradication of the Black Death. An image of this Saint from the 17th century can be found in the sacristy of the near-by Igreja Matriz da Guia (Main Parish Church).