The German-born professor of theology Martin Luther (1483-1546) had an incredible life that lead him to be one of the most prominent personae of the religious world. Not only was his life spectacular, but the heritage he left means a new faith, free of artifice and pretense. Of course, this did not leave him immune to the criticism of his contemporaries and even later, the Reformed Church had to struggle in order to gain the right to profess its faith. The strides made by this religious movement from the times of Martin Luther to being the most prominent faith in many countries is a thing we should all be in awe of.
The Reformed Church and Martin Luther himself were very often portrayed on stamps. Most notably, years such as 1983 (commemorating 500 years since the birth of Martin Luther), 1967 and 2017 (commemorating 450, and 500 years respectively since the Theses of Worms, which are considered the starting point of the Reformed Church) have proved to be very prolific. Below you can find most of the stamps related to the awesome journey of Martin Luther.
Austria issued three stamps related to the history of the Reformed Church. The first one was issued in 1967 and features an abstract design with religious insignia.