If the theme of “Art and Power” is timeless, this latest illustration of it—in the form of an ambitious exhibit organized under the auspices of the Council of Europe, examining art and architecture in Republican Spain as well as Spain under Franco, Mussolini’s Italy, Stalin’s USSR, and Hitler’s Germany—could not be more timely. Indeed, the original project dates back to 1988, the year before the fall of the Berlin wall, and its evolution is at once the result and the reflection of subsequent events. This sense of history shaping history was perhaps most acute in Berlin, where, after stops at