The Ordre de la Sincérité was founded on November 17, 1705, by the ruling Margrave George William of Brandenburg-Bayreuth, a member of the House of Hohenzollern.

As it was often the case with the orders of knighthood of the small German courts it soon fell into disuse.

However, was revived in 1712 in Brandenburg-Bayreuth and again in 1734 in Brandenburg-Ansbach, where it was renamed "Order of the Brandenburg Red Eagle".

The order was conferred in one class, limited to fifty knights.

[1][2] In January 1792, the Kingdom of Prussia bought both Brandenburg-Bayreuth and Brandenburg-Ansbach and on June 12, 1792, King Frederick William II again revived the order as a Prussian royal order.