Each building will have its year of construction and a motto carved into the stonework.
MMXIX is Roman numerals for 2019. and the Nun have chosen "Duc in Altum" as the motto for the Work Rooms & Recreation Building.
It comes from Luke 5, 1-11 where Simon Peter has been fishing all night and has caught nothing; Jesus tells him to "cast into the deep" or "draw into the depths". Reluctantly Peter obliges and the catch is miraculous.
You scrape the surface and you come away empty, you plunge the depths and the treasures astound you. The spiritual life demands this "leave your comfort zone", and to "dive into the deep end".