There are many misconceptions about the decoration of the period, most of which date from the 18th century and the classical revival that began soon after 1750. Many excavated bronze objects, including statues, and any bronze that remained above ground, such as the roofing of the Capitol, were melted during medieval times for new work since bronze was a scarce and expensive metal. This led to the assumption that marble predominated, which is not necessarily true, especially in the case of statuary. Time and exposure to the weather have removed the color from much of the marble that has survived, but in classical times it was commonly painted and sometimes gilded. Wall paintings at Pompeii and Herculaneum are ample testimony to this. Wall decoration began there about 150 BC, and, by about 80 BC, plastered walls were being made to look like masonry. Such decoration was combined with the true architectural features—e.g., doors and pilasters (flattened columns attached to the wall). The panels are painted variously in yellow, black, magenta, and red, with some imitation marbling indicating an earlier custom of applying marble veneers. The rich color was also supplied by superbly executed mosaic floors, elegant couches with colored cushions, and bronze tripods and lamps, such as in the cubiculum of a villa at Boscoreale near Pompeii preserved in the Metropolitan Museum in New York City. Many people want to know about a Turnkey contractor In Chandkheda.