- Use both for bronze coins of the Roman Republic and for copper coins used during the Roman Empire from the 1st century BCE through the 3rd century CE.
- Refers to a broad range of alloys of copper, specifically any non-ferrous alloy of copper, tin, and zinc or other trace metals. Bronze was made before 3,000 BCE -- possibly as early as 10,000 BCE, although its common use in tools and decorative items is dated only in later artifacts. The proportions of copper and tin vary widely, from 70 to 95 percent copper in surviving ancient artifacts. Because of the copper base, bronze may be very malleable and easy to work. By the Middle Ages in Europe, it was recognized that using the metals in certain proportions could yield specific properties. Some modern bronzes contain no tin at all, substituting other metals such as aluminum, manganese, and even zinc. Historically, the term was used interchangeably with "latten." U.S. standard bronze is composed of 90% copper, 7% tin and 3% zinc. Ancient bronze alloys sometimes contained up to 14% tin.
- Refers to the period in history and the style of art that developed when the Roman Republic ceased to exist and Rome expanded its territory and was ruled by emperors. The period is generally considered to begin with Octavian's victory at the Battle of Actium in 31 BCE, and to last through the rule of the Severans. For later emperors, see "Late Antique." For the period and culture of the Holy Roman Empire, use "Holy Roman Imperial." Note that some classifications include the Tetrarchic, Constantinian, and the Holy Roman Empire in the "Roman Empire."
- Refers to the period beginning in the Christianized Roman Empire in the fifth century and lasting until the Renaissance, which began in the 13th to the 15th century CE, depending upon which country is being discussed. The variety of styles that developed during the Medieval period are generally characterized by an evolution of the Greco-Roman tradition to incorporate Christian themes, the energetic spirit of the Celtic and Germanic peoples, and the thriving new towns populated by free men.
- Flat surfaces or slabs, either portable or mounted on a wall or other structure, bearing or intended to bear inscriptions or pictures; also, thin, rigid slabs used as writing surfaces.
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