Oldbawn (or Old Bawn, Irish: An Seanbhábhún) is a small suburban area now within Tallaght on Dublin's southside. Formerly a small village in its own right, it is situated between the Sean Walsh Park and the River Dodder.A bawn is the defensive wall surrounding an Irish tower house. It is the anglicised version of the Irish word bábhún, meaning "cattle-stronghold" or "cattle-enclosure"