The main picture is of the Igreja de São João Batista (Church of St John the Baptist) in Vila Viçosa a marble town in the Alentejo province of Portugal. Marble town? The place is surrounded by marble quarries, with the result that a lot of marble is used in building projects in the town. Maybe the residents get it a good price. Even modern houses have marble highlights. The church in the main picture dates from somewhere in the early 1600's and the exterior walls (wasn't inside - too late on a Saturday afternoon) are built of or cladded with marble.
The second picture shows the extensive use of marble in the main town square. The walking pavements are done with marble chips. These features, as well as an enormous Ducal Palace, the church and a castle; makes the town well worth a visit. Oh yes, they are famous for their red wines as well.
If the picture is not visible just above, you may view it at http://louis.shutterchance.com/image/2018/06/09/dscn6007blogjpg/
Marble is recrystalised limestone, so if you would heat marble chips in an clay oven for 3 days, they turn into calcium oxide. This is then mixed with water to become a splendid whitewash, which is cheaper than paint. Many residents touch their houses up annually.