What Wikipedia says

Ioannina is the capital and largest city of Epirus, an administrative region in north-western Greece. Its populations is 112,486, according to 2011 census. It lies at an elevation of approximately 500 metres (1,640 feet) above sea level, on the western shore of lake Pamvotis (Παμβώτις). It is the capital of Ioannina regional unit and the region of Epirus. Ioannina is located 450 km (280 mi) northwest of Athens.

Founded by the Byzantine Emperor Justinian in the 6th century AD, Ioannina flourished following the Fourth Crusade, when many wealthy Byzantine families fled there in the early 13th century following the sack of Constantinople. It was part of the Despotate of Epirus from 1358 to 1416, before surrendering to the Ottomans in 1430. Between 1430 and 1868 the city was the administrative center of the Pashalik of Yanina. In the period between the 18th and 19th centuries, the city was a major center of the modern Greek Enlightenment. Ioannina joined Greece in 1913 following the Balkan Wars.

Landmarks and sights include: Isle of Lake Pamvotis, Ioannina Island, Ioannina Castle, Fethiye Mosque, Greek Orthodox churches, Ottoman mosques, Jewish Synagogue of Ioannina, The National Archaeological Museum of Ioannina, the city's Byzantine, the Municipal Ethnographic Museum and the Municipal Art Gallery of Ioannina. Near Ioannina, 10 kilometres (6.2 mi) south of the city, lies the Pavlos Vrellis Greek History Museum, a wax museum which covers events and personalities from Greek history.

The region of Ioannina is well known for the production of Feta cheese and its Baklava. The area is also famous for its spring water Zagori, which is sold over much of Greece. Ioannina is famous throughout Greece for its silverwork, with a plethora of shops selling silver jewelry, bronzeware and decorative items (serving trays, recreations of shields and swords, etc.).