We know something about Segesta, Sicily from Thucydides, but not why its 5th century temple was never completed.
Temple of Hera, 5th Century BC, Selinunte, Sicily 2013. The Greek temple is majestic and mysterious. Selinunte is one of my favorite archaeological sites of all time. People frequently drive right by it in a race to get to the more famous Agrigento just down the coast. Pity.