Was a bit perplexed as to where exactly this photo might have been taken, as this building and lovely terrace are no longer with us. Thanks to some of our usual suspects, we now know that this was the Sisters of Mercy run Sedes Sapientiae (Girls') Teacher Training College, that much later morphed into Carysfort Teacher Training College in Blackrock.
P.S. Check out the nearest gas lamp. It has a little metalworked 2225 on it!
Date: 1890?? Can that gaslight number help us here?
NLI Ref.: L_ROY_01200
Owner: National Library of Ireland on The Commons
Source: Flickr Commons