Szeged III. In the second century AD there was a Roman trading post established on an island in the Tisza, and the foundations of the Szeged castle suggest that the structure may have been built over an even earlier fort. Today only one corner of the castle still remains standing. During the Mongol invasion the town was destroyed and its inhabitants fled to the nearby swamps, but they soon returned and rebuilt their town. In the 14th century, during the reign of Louis the Great, Szeged became the most important town of Southern Hungary, and – as the Turkish armies got
Metropolitan City of Naples capital city. Due to the presence of Vesuvius and Phlegraean Fields, the city is vulnerable to seismic and volcanic activity. The city is 96th out of 110 Italian provinces and metropolitan cities by landmass, with an area (1,171 km² including islands) that is smaller than the core "comune" of Rome (1,287 km²). Naples is nevertheless Italy's 3rd largest city by population, making it one of the most densely populated areas in Europe; the metropolitan region also includes the municipality of Casavatore, the highest-density municipality in Italy (at 12,000 inhabitants/km²). While it contains more than half of Campania's population, it only