Palacio del Temple which was commissioned by Charles III of Spain, houses a monastery and a church that used to belong to the Templars. Nowadays, this Neoclassical building is used by the university of Valencia.
The complex can be visited.
Wikipedia (Spanish) https://es.wikipedia.org/wiki/Iglesia_y_palacio_del_Temple_(Valencia)
Phone +34 96 398 6422
Address Plaza del Temple 2, 46003 Valencia, Spain
Coordinates 39°28'36.138" N -0°22'15.852" E