Amsterdam was bombed by both sides during World War II, and as a result many of its old buildings were reduced to rubble. After the war they cleaned up the building sites and put all the decorated pieces in storage, thinking they would one day find a good use for them.
They have now given up and decided to sell the pieces. As you can see, they are big chunks of stone, not paper weights, and you have to specify how you plan to use them in your offer. Catalog here. The catalog shows you both the piece and an old photo of the building it came from. So let's see those plans, folks.