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The terms terracotta and faience can be used more or less interchangeably for the structural and decorative ceramic material used extensively on buildings from about 1880 to the 1930s. Faience is more generally applied to the type which has high glaze, often multicoloured, as featured for example on The Grand Arcade, and The Three Legs pub.

The material is similar to the denser bricks developed in the 19th century and has a generally impermeable surface compared with softer stones and common bricks. Compared with stone, where every stone had to be individually carved (even when done mechanically), terracotta decoration could be produced in numbers from a single mould.

The presence of large numbers of buildings using the material in Leeds is connected with the fact that one of the major British manufacturers was the Burmantofts pottery and brickworks in the eastern suburbs of the City. Around 1900 Burmantoft developed a very pale version, in imitation of white marble, which was given the trade name 'Marmo'. As well as being used for buildings in the more 'Rococo' style of the early 1900s (e.g. Scottish Union and National Insurance Company building on Park Row) it was much favoured in the Art Deco period for major cinema and shop frontages.