When renovating a home, most people expect a few surprises behind the walls, usually involving electrical or plumbing issues. But imagine tearing through a wall and discovering something that's been hidden for decades or even centuries!
Some discoveries have been far stranger (and, occasionally, much more valuable) than anyone could have imagined. Forgotten fortunes, stolen masterpieces, and even a mummified cat have all been discovered inside seemingly ordinary walls, revealing age-old secrets hidden in plain sight.
Curious? Click through to discover the strangest things people have found hiding behind walls.