In the city of the ancient Romans and Michelangelo, architecture buffs got a preview over the weekend of something decidedly modern: Rome's new museum of contemporary art. It was designed by Iraqi-born Zaha Hadid. The Maxxi is a rare example of the avant-garde in what's known as the Eternal City. But the style Hadid seems most inspired by is baroque - fluid and sinuous forms, concave and convex spaces, and white curving lines that mysteriously disappear and reappear.