His father, also named Rainer, the seventh son of the Emperor Leopold II.
After serving in the army, the Archduke Rainer was in 1857 placed at the head of the permanent Imperial Council organized in 1851, which stood immediately under the Emperor and had among its functions the preparation of laws, and his experience in this office convinced him that the transition to a constitutional form of government on a liberal and centralized basis was necessary.
The papyrus, which is of the 3rd century, was discovered by Bickell among the Rainer collection, who characterized it (Z.
In addition to private rooms and state apartments, the Hofburg contains a library of about 800,000 volumes, 7000 incunabula and 24,000 MSS., including the celebrated "Papyrus Rainer"; the imperial treasury, containing the family treasures of the house of Habsburg-Lorraine, and other important collections.
His pupil, Rainer Gemma-Frisius, used it for the observation of the solar eclipse of January 1544 at Louvain, and fully described the methods he adopted for making measurements and drawings of the eclipsed sun, in his De Radio Astronomico et Geometrico (1545).