The royal barges are slender, fantastically ornamented vessels used in ceremonial processions. The tradition dates back to the Ayuthaya era, when travel (for commoners and royals) was by boat. When not in use, the barges are on display at this Thonburi museum.

The most convenient way to get here is by motorcycle taxi from Phra Pin Klao Pier (ask the driver to go to reu·a prá têe nâng ). The museum is also an optional stop on long-tail boat trips through Thonburi’s canals.

Suphannahong, the king’s personal barge, is the most important of the six boats on display here. Made from a single piece of timber, it's said to be the largest dugout in the world. The name means Golden Swan, and a huge swan head has been carved into the bow. Lesser barges feature bows that are carved into other Hindu-Buddhist mythological shapes such as the naga (mythical sea serpent) and garuda (Vishnu's bird mount).

Historic photos help envision the grand processions in which the largest of the barges would require a rowing crew of 50 men, plus seven umbrella bearers, two helmsmen and two navigators, as well as a flagsman, rhythm keeper and chanter. Today, the royal barge procession is an infrequent occurrence, most recently performed in 2012 in honour of the king's 85th birthday.