The Order of Dobrzyń () or Order of Dobrin (), also known as the Brothers of Dobrzyń (), was a military order created in the borderland of Masovia and Prussia (today's Dobrzyń Land, Poland) during the 13th century Prussian Crusade to 'defend against Baltic Prussian raids'. In Latin the knights were known as the Fratres Milites Christi (de Prussia, de Dobrin, de Dobrzyń, de Mazovia), and they were nicknamed the Prussian Cavaliers of Jesus Christ. At first the Order was composed of 15 German knights from Lower Saxony and Mecklenburg led by Master Brunon.