From 1900 , it lost its defensive role .
From 1900 , it was used as a jail and was finally abandoned in 1993 after which it was at the mercy of the elements , and had begun to crumble .
From 1900 , it lost its defensive role and was used as a jail and was finally abandoned in 1993 after which it was at the mercy of the elements , and had begun to crumble .