Dating back to Roman times, with some bits still extant
Back in the day, Bologna, like most other European cities from the Roman era through the Middle Ages, was encircled by a doughty stone wall to protect it from invaders. Here, various patches of the city's "selenite circle" - built between the 3rd and 12th centuries - still stand, but the outermost walls were eventually replaced in the 20th century by the ring road which we see today.
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10 tips to keep your hand baggage
Find out what type of packs are considered hand baggage and how to can change them so that they can go in the cabin with you during the flight.Free download