They depict two Roman monuments, respectively: the Temple of Vespasian and Titus, beneath the Capitoline Hill, then known as Jupiter Stator, as indicated by an old inscription on the back (see photo);
and the Castel Sant'Angelo with the bridge before its 19th-century modifications.
They can therefore still be dated to the very early 19th century.
Very fresh, the state of preservation is truly excellent.
Total diameter cm 11,8