![](http://photos1.blogger.com/img/166/7468/320/DSCF2497.jpg)
A mark of a mason in the choir. It is possible to find 6 different types of them. Six different skilled people worked at around 1470 to add choir and sacristy to the pre-existing structure, that is the first (smaller) Church and the side chapel added by Lady Catherine St. Clair after 1434.