Kate and I like old homes even if they come with a lot of mechanical puzzles. One of my favorite features on our current 100+ year old home is its original oak and stained glass front door.
A hundred years of slamming and freezing weather had left the stained glass precariously loose with broken zinc came and gaps you could pass a pencil though. After a lot of hunting we found a local restoration company who did a great job fixing the window using all the original glass and new lead came.