This article analyses the development of masonry, used extensively during the construction
of tenement houses in Czech towns after the middle of the 19th century, peaking at the turn of the
20th century. The dimensions (wall thickness) were defined by architectural codes issued for Czech
Crown Lands (i.e. Bohemia, Moravia & Silesia) in three waves – the first one taking place from 1833
till1835, the second one from 1864 till1884, and the third one from 1886 till1894. Tenement
houses belonged, without exception, to the so-called “below-threshold” buildings, where a wing was
6.32 m deep (later 6.5). These principles are presented in historical examples of selected works by
students of the Prague Polytechnical Institute and architectural designs for Prague (Bubeneč and
Nusle boroughs).