"Veni, vidi, vici" (Gaius Julius Caesar)
The tents of the all-conquering Roman legions were made from goat and/or calfskin. To come as close to the original as possible FAM WEST Roman tents are produced in rectangular brown leather-colored tent fabric. This keeps the price down but gives a high degree of authenticity.
(A reenactment group in the US has made a replica goatskin tent (77 goatskins), it took around 750 hours work)