RT Journal Article SR Electronic A1 Bartoš, Ladislav T1 Stonemasons marks in the passage of The Powder Tower JF Staletá Praha YR 2015 VO 31 IS 2 SP 76 OP 88 DO 10.56112/sp.2015.2.05 UL https://staletapraha.cz/en/artkey/pha-201502-0005.php AB The text concerns problems of the methods of survey and documentation of stonemasons' marks and pays attention to the current state of viewing the results of work done in this field so far, i.e. publication of documented stone marks on Prague buildings. Walls in the passage of the Prašná Gate have been chosen to practical verification of options and limits during their documentation without direct access (from scaffolding, platform etc.). Documentation of marks on the ashlar walls was pursued solely from the pavement level using a camera, folding 2 m rule as a graphical scale and sun light at various angles in various seasons and day times on certain parts of the walls. Individual types of marks and their position on the walls were documented. The marks come from the period of the tower construction in 1475-1483. In the second half of the 19th century the marks were documented by František Beneš, Franz Rziha and Josef Mocker. The finds from the passage could thus be compared with earlier documentation, which was widened with further types of marks found in the accessible interiors of the tower.