Its eight half arches are surmounted by a monde: a globus cruciger on a crown, with a cross at its top—as Portugal was a Catholic nation.

The base of the crown is elaborately decorated with baroque patterns and designs.

The crown was fashioned in the workshop of D. Antonio Gomes da Silva, the Royal Jeweler.

The crown was made as part of the set of crown jewels, which included the Sceptre of the Armillary and the Mantle of João VI, which was specifically made for João VI's acclamation.

Though serving as the monarchy's official symbol, the crown was never actually worn by any Portuguese monarch.