Architectural styles prominent at Teotihuacan are found widely dispersed at a number of distant Mesoamerican sites, which some researchers have interpreted as evidence for Teotihuacan's far-reaching interactions and political or militaristic dominance. A style particularly associated with Teotihuacan is known as "talud-tablero", in which an inwards-sloping external side of a structure ("talud") is surmounted by a rectangular panel ("tablero"). Variants of the generic style are found in a number of Maya region sites, including Tikal, Kaminaljuyu, Copan, Becan, and Oxkintok, and particularly in the Petén Basin and the central Guatemalan highlands. The "talud-tablero" style pre-dates its earliest appearance at Teotihuacan in the Early Classic period; it appears to have originated in the Tlaxcala-Puebla region during the Preclassic. Analyses have traced the development into local variants of the "talud-tablero" style at sites such as Tikal, where its use precedes the 5th-century appearance of iconographic motifs shared with Teotihuacan. The "talud-tablero" style disseminated through Mesoamerica generally from the end of the Preclassic period, and not specifically, or solely, via Teotihuacano influence. It is unclear how or from where the style spread into the Maya region. During the zenith main structures of the site, including the pyramids, were painted in dark-red (maroon to Burgundy) colors (only small spots remain now) and were a very impressive sight.