Architecture and perspective were linked from the outset in that reconstruction of space and its representation went hand in hand. Most of the early theorists of perspective were also architects, e.g. Brunelleschi, Alberti, Filarete, Francesco di Giorgio Martini, Leonardo da Vinci. P‚lerin (1505) was the first perspective treatise to include a series of buildings, but the illustrations remained primitive. The work edited by Rodler (1531) produced more convincing ones. The tradition of Roman ruins as published by Serlio, Androuet, Vredeman, Palladio, and Scamozzi established this as a systematic approach. Architecture remained an important theme in the treatises. In the 18th century, architectural drawing and in the 19th century architectural drafting became independent categories.