large painting on hinges, foldable from the wall

[JanneSjo]

I'm considering getting a large painting similar to this one, which is 200cm wide and 140cm high.

I want to be able to have a hinge or something similar on one side so that it can be swung out like a door. (need to access what's behind the painting, not often but sometimes)

Also want it to sit as close to the wall as possible.

Has anyone done this and have good ideas for the hinge part?

 

[Kriff]

A piano hinge should work in your case, available in lengths up to 3.5 meters. But make sure the frame is stable enough when you want to "hang it like a door." A brace on the back might be needed.