Busloads of local school kids love to come to the MAC, at the foot of Montjuïc, to learn about their ancestors’ history. But there are rewards for foreign visitors as well, even if the three-language wall texts are a little inconsistent. Housed, a bit awkwardly, in a pentagonal building built for the 1929 International Exposition, this museum deals with pre-history somewhat ploddingly, but the artifacts left behind by Phoenicians and Greeks show clearly how Catalunya related to the rest of the Mediterranean basin (“The Great Blue Bridge”). There is an amazing mosaic floor unearthed from a patrician home in ancient Roman Barcino and a beautiful collection of fragile objects of ancient glass. The museum recently dusted off its medieval section, and the new installation is an eye-opener: How often to you get a chance to see belt buckles and household objects of the Visigoths?