The Pavilion of Regalia, Royal Decorations and Coins is the museum under the Treasury Department responsibility, exhibits most precious and exquisite national treasures of Thai history. The museum was first established as Thai Coin Pavilion with royal permission to use some part of the Privy Purse Office in the Grand Palace to display the evolution of Thai coins.

          Since its opening, the Thai Coin Pavilion had drawn large numbers of Thai and foreign visitors. The Treasury Department therefore asked for royal permission to use an additional area of the Privy Purse Office to establish an exhibition of royal regalia and decorations. Over the decades, the museum has seen major changes and renovations.  The museum was renamed The Pavilion of Regalia, Royal Decorations

          Permanent Exhibition Floor 1 – exhibits most interesting valuable national treasures of Thai history which present Thailand’s unique, rich art, and cultural heritage. The gracious honorable when Their Majesties the King and Queen, Their Royal Highnesses Princess Maha Chakri Sirindhorn and Princess Chulabhorn presided over the inauguration of the museum.

          Permanent Exhibition Floor 2 – displays Royal Decorations and Regalia in different categories, and Paraphernalia in auspicious ceremonies, which are royal ordained, coronation, celebratory ceremony for the newborn princes and princesses.  Moreover, the museum presents history of national treasures, such as attires of the Emerald Buddha, Silvery Tree and Golden Tree, etc. and the evolution of Thai coins from the past to present reigns.