The
architectural finds which have superimposed themselves on each
other over the centuries are marked on the back of the church:
the base and lower part of the 15th Century apse; the 15th Century
external closing wall of the oratory of St. Francis; the apse of
the chapel of the Madonna, dating from the end of the 15th Century
and the beginning of the 16th Century (it does not have its own
foundations and rests on the remains of the apse of the church
which existed before the friars' arrival on the island). The perimetral
lay-out of the 17th Century chancel and of the cylindrical chancel
of 1923 are visible.
The avenue coincides with the buttress erected during the Napoleonic
invasion by the troops who occupied the island: it is a rampart placed
against the 15th Century wall which surrounded the island and is perfectly
preserved to its depths even today.
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