Tables can have columns. You will find them in word processors, spreadsheets and databases. Buildings can have columns.
The columns on the buildings in "To Kill a Mockingbird" symbolize tradition, heritage, and social status in the Southern town of Maycomb. They represent the established power structures and the façade of respectability maintained by the townspeople. Additionally, the columns serve as a visual reminder of the racial prejudices and inequality pervasive in the society depicted in the novel.
There are far more than 7 buildings in Ireland with columns. There would be hundreds of them all around the country.
Both Greek and Roman architecture have large buildings and columns but probably more-so Greek
Columns
vikings
Ionic columns were used in many famous Greek buildings.
I think you have to be a little more specific with your question. Because there are millions of buildings with columns.
the white house
The Lincoln Memorial has columns from the Doric Order made of Greek Architecture.
second bank in the united states
Antas