With a new age of great architecture in full flight, the editors of TIME explore the most astonishing structures of the 21st century, the most influential buildings of the past and the master architects who have helped shape contemporary life. Here are visions of great beauty, from the Taj Mahal to the Sydney Opera House. Here are icons that resonate with history: the Pyramids at Giza, the Chateau de Versailles, Britain's Westminster Palace. Here...