In ancient times, Sant Antoni de Calonge served as a summer retreat for the Romans. Construction on the fortress in Calonge dates back to the 8th century.[2] The church of St. Daniel and a Roman road are the two oldest buildings of architectural value still standing in Sant Antoni. The church of St Daniel dates back to the sixteenth or seventeenth century.[3] Additionally, there are some ruins, megaliths, Chalcolithic burial caves, and ancient artifacts scattered across the coastline and housed in the Archaeological Museum of Calonge.[3] This archaeological evidence suggests the area was inhabited during the periods of Prehistoric Iberia and the Roman Empire.[3]
Sant Antoni did not begin to develop as a separate town until fishing villages began populating the Spanish coast in the late eighteenth century with the decline of piracy.[3] With few ancient structures to impede development, most buildings in Sant Antoni are from the twentieth century, although some homes date back to the eighteenth and nineteenth centuries.[3] The Neo-Gothic church of Saint Anthony was built in 1936.[4] Sant Antoni de Calonge is now under the municipality of Calonge. However, it was an autonomous town in 1936 under the name, San Antonio de Mar[4] and later Levantine Sea.[4] This autonomy only lasted during the Spanish Civil War, from 1936 until 1939.[4]