Perugia, capital city of Umbria, is in the middle of the “green heart of Italy”. Ancient city founded by Etruscans, Perugia is conserving all the trace of its story in its streets and backyards and offers a prosperous cultural and night life. Perugia's hilltop town center - connected by escalators - is a good place to explore medieval lanes and fine buildings. Corso Vannucci, the town's principal street, is pedestrianized and leads to the main square, Piazza IV Novembre. A grand thirteenth-century fountain known as the Fontana Maggiore is the square's centerpiece. The town's cathedral, the Duomo or Cattedrale di San Lorenzo has a baroque facade and Roman ruins below, but dates mainly from the fourteenth and fifteenth centuries. The cathedral museum contains some of the finer artworks from the church, including an altarpiece by Luca Signorelli. One of the main symbols of the city of Perugia is the Arco Ertusco (Etruscan Arch), the largest of the seven access doors to the old city, built in the second half of the third century BC. It faces Piazza Grimana (Grimana Square) next to the magnificent Palazzo Gallenga Stuart (Gallenga Stuart Palace) which now houses the famous University for Foreigners of Perugia, one of the most important in Italy. As the region's capital, Perugia is home to the Museo Archeologico Nazionale dell'Umbria, a regional archaeological collection including interesting local Etruscan exhibits, and also to the main Umbrian art gallery, the Galleria Nazionale dell'Umbria. The art gallery is housed in what is probably Perugia's most notable building, the Palazzo dei Priori.