Hypocaust

A system for heating rooms in Roman buildings in which the floor was supported on pillars. Hot air was circulated in the space under the floor, warming the floor and room above. Being special rooms, these floors often had mosaics on them. Here's an example

additive -- adhesive -- admixture -- aggregate -- andamento -- armature -- background -- backing -- bozzetto -- byzantine -- cartoon -- cement -- ceramic -- ceramic tiles -- concrete -- cosmati -- crazing -- curing -- direct method -- efflorescence -- emblema -- encaustic tiles -- epoxy -- florentine mosaic -- geometric pavement -- glaze -- gothic revival -- graffito -- greek key -- grid technique -- grout -- grout file -- grout sealer -- guilloche -- herringbone -- hypocaust -- indirect method -- inlay -- intarsia -- interstice -- joint -- memento mori -- meta mosaic -- micromosaic -- monogram -- mortar -- opus -- opus musivum -- opus paladanium -- opus regulatum -- opus sectile -- opus tessellatum -- opus vermiculatum -- pelta -- peppering -- picassiette -- pietre dure -- pique assiette -- pseudo mosaic tiles -- PVA glue -- reverse method -- sgraffito -- silicone sealant -- smalti -- squeegee -- substrate -- terracotta -- terrazzo -- tessellate -- tessera -- tesserae -- tile cutter -- tile nippers -- trompe l'oeil -- vitreous glass tiles -- zillij --