There's plenty of pages that show lots and lots of medieval pavilions. This set of links focuses on images of people setting up pavilions -- which provides more clues as to how they might have been constructed.

If you'd like to construct your own medieval tent or pavilion, visit these links.

• Encampment before Damascus, Chroniques de France ou de Saint Denis (British Library Royal 16 G. VI, f.323), second quarter of the 14th century
• Encampment of the Greeks, The Trojan War (ÖNB 2773, fol. 110v), c. 1445-1450
• Detail from Leopold der Milde section of an altarpiece, c. 1489-1492