Renaissance science spawned the Scientific Revolution; science and technology began a cycle of mutual advancement. The "Scientific Renaissance" was the early phase of the Scientific Revolution. In the two-phase model of early modern science: a "Scientific Renaissance" of the 15th and 16th centuries, focused on the restoration of the natural knowledge of the ancients; and a "Scientific Revolution" of the 17th century, when scientists shifted from recovery to innovation. Some scholars and historians attributes Christianity to having contributed to the rise of the Scientific Revolution.