Although the European Renaissance was a flowering of science, technology, and exploration, it could easily be said that the true beginnings of the period were in the arts. Perspective was an important innovation, of course, but Classical Arts also takes into account two other new ideas; the revival of Classic Greco-Roman architecture and sculptural styles and the creation of secular art. No longer was the subject of an artwork just about the Christian religion or a series of depictions of the royalty, but about the middle-class merchant, the oddities from around the world, and the common worker. Music, too, broke free of the same bonds. Operas were now about regular people with regular problems. It could be said that just such an attitude lead to free-thinking Reformationists, Natural Philosophers, and the wayward spirits that lead to the exploration of the rest of the world.