Josef Maria Eder was an Austrian chemist who specialized in the chemistry of photography, and who wrote a comprehensive early history of the technical development of chemical photography.

Krems an der Donau is a town with 25,271 inhabitants end 2022 in Austria, in the federal state of Lower Austria. It is the fifth-largest city of Lower Austria and is approximately 70 kilometres west of Vienna. Krems is a city with its own statute, and therefore it is both a municipality and a district.