The website of Terra Nordica of the Military Order of the Collar makes known in its various historical and cultural aspects the Dynasty that formerly reigned over the Lands of the Crown of Aragon.

The Real Aula Mallorquesa is an academic institution closely related to the Militare Ordine del Collare di Sant`Agata dei Paternò, and belongs to the Royal House of Aragon, Majroca and Sicily.

The Royal Aragonese College of Arms (RACA) is a corporation of Officers of Arms connected with the Militare Ordine del Collare di Sant`Agata dei Paternò.

The website of the Militare Ordine del Collare di Sant` Agata dei Paternò makes known the August Dynasty that formerly reigned over the Lands of the Crown of Aragon.

The MOC Charitable Foundation is established and administered by members of the Militare Ordine del Collare di Sant`Agata dei Paterno, the Grand Priory of the English Tongue.

The site of the Royal House of Aragon and the Militare Ordine del Collare di Sant`Agata dei Paternò seeks to provide the fullest possible range of documentation on the Royal House.