Saint Catherine's head in Siena/the rest is in Rome

The preserved head of Italy's co-patron saint, Catherine of Siena (the other being St. Francis, of course), can be seen in the church of San Domenico, a cavernous and bland building it is too, as you walk toward the center of Siena from the city's tourist parking areas. You can't miss it. You will find Catherine's head behind glass in a tabernacle on the altar in a chapel dedicated to her inside the church. Her head seems so small. See www.italyguides.it/us/siena_italy/san_domenico/basilica_of_san_domenico.htm )
The rest of Catherine is buried in Santa Maria sopra Minerva church, on Piazza della Minerva (which is adjacent to the Pantheon), in Rome. This church was built on top of a Roman temple to Minerva, hence the name. Fra Angelico is also buried in Santa Maria sopra Minerva. There are also 5 Popes buried here. This is where Bocelli's "Sacred Arias" concert was filmed a few years ago, by the way.
( http://en.wikipedia.org/wiki/Santa_Maria_sopra_Minerva )