The old medieval district of Ciudad de Ibiza (Ibiza Town), the capital of the island, sports narrow cobblestone streets, picturesque whitewashed houses and Gothic buildings around courtyards bright with blooming geraniums and bougainvillea. The old town, enclosed by historic walls and entered through the Puerta de las Tablas, contains some interesting sights, most noteworthy of which is the Archaeological Museum. The museum contains artefacts from prehistoric sites on the Balearic Islands, dating as far back as the Punic period between the 5th and 7th centuries BC. Also in the old town is the cathedral with its 10th century Gothic tower and 18th century Baroque nave.