- Chiesa di San Pietro Extra Moenia
The two panels indicating the contrast between posthumous fates of a righteous man (above) and of a sinner (below). - Chiesa di San Pietro Extra Moenia
The story about the lion and the woodcutter. - Siena Cathedral
She-wolf of Siena, surrounded with emblems of confederate cities, dating from 1373. - Siena Cathedral
The Hellespontine Sibyl (detail) by Neroccio di Bartolomeo. She was known for her prediction of Crucifixion. The wolf and the lion represent Siena and Florence. - Museo Arcivescovile
Pulpit - ambo (597) shows plenty of animals as well as Saints John and Paul. Made out of a reused old sarcophagus. - Classe
My guess would be that the difference in green background also means the border between the original and restored mosaics.