Conversation so far:
What type of settlements were there?
There were very few nucleated settlements in Gaelic areas.
What did the buildings look like?
It was at this time, perhaps as a response to Viking raids, that many of the Irish round towers were built.
What material were the buildings made of?
concentrated in counties Limerick and Clare but are lacking in Ulster, except the area around Strangford Lough.

Question: Did the buildings survive?
Self-contained rewrite: Did the buildings survive in Gaelic Ireland?