Johann Regiomontanus Muller, German mathematician and astronomer, c 1460.
© Science Museum / Science & Society Picture Library
Johann Regiomontanus Muller (1436-1476) completed a re-translation of Ptolemy's 'Almagest'in 1461 from Arabic to Latin. Muller's translation led to a resurgence in interest in mathematics. His 'Five Books on Triangles of All Kinds' was published posthumously in 1533.