Originally built in the 11th century, the Chiesa di San Donato has been renovated so many times, it's a mess of the Gothic, Romanesque and more modern styles that were popular in Scarlino during their respective periods.
Unlike the Chiesa di San Martino, this church's exterior isn't going to blow you away, but its interior will.
Inside, the church retains its original Latin cross design and is teeming with Romanesque charm.
A tablet representing an anguishing Christ being crucified between St Roch and St Jerome is, I think, the most beautiful work in this church. Its vibrant colours have survived the centuries in all their exquisite splendour.
If you have a taste for the macabre, you can also visit the crypt in the front section of the church. In there is the tombs of Vanni and Emanuele Appiani, the sons of Jacob III, who both died in 1471.