Situated in the Islas Baleares (Balearic Islands), UNESCO's World Heritage committee recognized Ibiza's unique cultural and historical legacy, demonstrated both through the historical city and the archaeological sites around its periphery. From the monumental area of Dalt Vila to the necropolis of Es puig des molins adn the archaeological site of Sa Caleta, the remnants of Ibiza's ancient Phoenician and Carthaginian cultures shed light on the island's role in the earliest Mediterranean trade and economy. The very different Alta Vila (Upper Town) is, on the other hand, one of the best examples of Renaissance military architecture. During the 15th and 16th centuries, the fortified walls would serve as a model for the development of fortifications in Spanish colonies throughout the newly discovered Americas.