These fortified courtyards were essential features of the plantation era, providing protection for colonists and their livestock from raids and attacks. The Toomore bawn, like others scattered across Ireland, consisted of a walled enclosure with defensive features such as corner towers or flankers, though much of the original structure has weathered away over the centuries.

The bawn would have been associated with a fortified house or castle, creating a secure compound where daily life could continue even during times of conflict. Cattle, horses, and other valuable livestock were driven into the bawn at night or when danger threatened, whilst the high walls, typically reaching four metres or more, deterred would-be raiders. Archaeological evidence suggests that Toomore’s bawn followed the typical rectangular plan common to Mayo, with walls thick enough to withstand musket fire; a necessity in an era when tensions between Gaelic Irish clans and English settlers frequently erupted into violence.

Today, the remains at Toomore offer a glimpse into this defensive architecture that once dotted the Irish countryside. Though only partial walls and foundations survive, they serve as tangible reminders of a period when security concerns shaped every aspect of rural construction. The site represents not just military architecture but also the complex social dynamics of plantation Ireland, where new communities attempted to establish themselves whilst existing populations fought to maintain their traditional lands and ways of life.