We do not know when the Templar commandery was established, but the first known document⁽²⁾ mentioning the existence of a Templar house in Amboise dates from 1219. In this document, it is referred to as "domus militioe Templi de Ambasia".
. This commandery was located in the parish of Saint-Denis-Hors. The Templars also owned a mill there.

The location occupied by the commandery is recalled by various names: "Hameau de la Commanderie", "Rue des Templiers", "Rue de la Commanderie". Virtually nothing remains of its buildings except for a vaulted cellar.

As for the hospitaller commandery, we do not know the exact date of its establishment either. The first text mentioning its existence dates from 1307, where it is referred to as the "Maison de l'Hopitau d'Amboise".

Subsequently, due to its location on an island in the Loire River, it came to be known as the Commandery of Saint-Jean-de-l'Ile.

After the abolition of the Order of the Temple in 1312, the Templar commandery of Saint-Denis passed to the Order of the Hospital, but it was not until around 1450 that it was attached to the Hospitaller commandery of Saint-Jean-de-l'Ile.

After the Revolution of 1789, the buildings of the two commanderies and all their annexes were sold as national property.

Of the entire complex, only the Saint-Jean Chapel remains, located in the centre of the island.
This chapel, rebuilt around 1742, was constructed in a single phase using regular masonry and measures 18 metres long by 7 metres wide.