House Tablets in Amsterdam

I was renting an apartment in the Jordaan district of Amsterdam when I was visiting the city.  In this neighborhood, you come across a large number of  “stone tablets” seen above the door or somewhere on the front facade (though I saw a couple on the side) of a building.  I didn’t capture so many but here are a few (and they didn’t all come from Jordaan).  I especially like the pig one although it looks new and could be a recent installment?  And what looks like a bird cage is a bird cage, not a tablet. ^^