I didn't know who to call to fix a very old broken Altbau door glass and by pure luck came across…read moreGlaserei Berlin. When I called, they wanted to see pictures and said they were very sorry, but didn't have the exact (100 plus year old) glass any more, but they have a library of other old glass and can I come down and take a look? A glass library? Who does this? They actually maintain a huge collection of old glass in a giant warehouse and let me go through it to find a very good color match. I mean, their business is obviously more modern, regular windows and stuff and they've got lots of guys and trucks--but to take the time and effort to do this is beyond professional. I was stunned. They love glass like nobody I have ever heard of. To top it off, the owner came out with his guys (for my little door project) because he likes this stuff. They did a great job!