Donatello summary

Altar, in religion, a raised structure or place that is used for sacrifice, worship, or prayer. Altars probably originated when certain localities (a tree, a spring, a rock) came to be regarded as holy or as inhabited by spirits or gods, whose intervention could be solicited by the worshiper. The

Relief, (from Italian relievare, “to raise”), in sculpture, any work in which the figures project from a supporting background, usually a plane surface. Reliefs are classified according to the height of the figures’ projection or detachment from the background. In a low relief, or bas-relief

Sculpture, an artistic form in which hard or plastic materials are worked into three-dimensional art objects. The designs may be embodied in freestanding objects, in reliefs on surfaces, or in environments ranging from tableaux to contexts that envelop the spectator. An enormous variety of media