Duomo, Ortygia, Syracuse, Sicily: the south aisle showing the massive fluted Doric columns integrated into the structure

NOTES: This was originally built as a temple to the goddess Athena in c. 480 BC but was converted into a Christian church in the 7th century and became the city's cathedral soon afterward. The ancient columns were integrated into the new structure. After the earthquake of 1693, a new Baroque facade, designed by Andrea Palma, was added to the cathedral and it was completed in 1753.