This impressive church was built on the ruins where an old mosque once stood. Construction began in 1265 and was not completed until 1783. It underwent many reforms and adjustments at the hands of various architects, with different styles and decorative motifs being added until final basilica was created. Looking back, it's a compendium of all architectural styles that existed until the late 17th century.
The result is magnificent. Also, if you are here in mid-August you can see the "Misteri D'Elx" which was declared by UNESCO to be an Intangible Cultural Heritage in 2001.
You can't miss the two facades: the Assumption and San Agatángelo, both by French sculptor Nicolas de Bussy and completed between 1680 and 1682.