Where is Raphael’s School of Athens located? A)Cathedral at Notre Dame
B)Vatican papal apartments
C)Tower of London
D)Sistine Chapel

D)Sistine Chapel

Explanation:

answer; thinker;

your word would be isle.

isle is an island or peninsula especially a small one.

if you add the letter "a" you get aisle, which is a passage between 2 rows of something like chairs, shelves, or something else.