The plaque in the trunk of my car

This thick marble plaque takes up the whole back of my Prius.  Weighs a ton.  I think it's even too heavy to take in the car.  Norm S. gave it to me today (in the pouring rain).  He struggled to get it in the car.  I'm going to drag it to UW tomorrow.  Why not?  Can't dance.

Better than being in the parking garage next to his car.

This plaque commemorates the gift of the organ to the new building for Temple De Hirsch in 1907.  But the building is long gone and I'm pretty sure that the organ is gone also.

But what to do with the plaque??