Association of German Barbers, Hairdressers and Wigmakers Guilds?

Hello My great-grandfather has an apprenticeship certificate from the "Association of German Barbers, Hairdressers and Wigmakers Guilds" The following data: Ernst Wiese born: 07.11.1902 in Northeim Apprentice Roll No: 172 Signature on: 12.04.1920 Can we find out anything about genealogy in this regard? Are there any more detailed archival documents available for review? Thank you…

Online archives?

Dear community I have read many books about history, Napoleon, Crusades, Thirty Years’ War, Discoveries in Antarctica, colonizations, etc. The authors of these books always rely on sources and do research in archives. If I want to find out more about certain topics in world history through archives, How do I get there? Are there…