The example at Glaspatrick in County Mayo is one such site, a rath, which is the Irish term for a ringfort defined by an earthen bank rather than stone walling. These were the enclosed farmsteads of early medieval Ireland, typically dating from roughly the fifth to the twelfth centuries, where a single family and their livestock lived within a roughly circular rampart that offered a degree of protection and, perhaps equally importantly, a visible statement of status in the landscape.

Glaspatrick itself is a townland whose name carries an obvious Patrician echo, suggesting an early association, real or legendary, with the spread of Christianity across Connacht. Mayo as a whole is densely layered with early medieval activity, and a rath in this part of the county would fit comfortably into a wider pattern of dispersed rural settlement that characterised the region for centuries. The earthen ringfort was the ordinary unit of that world, a low circular bank enclosing a space where people farmed, kept cattle, and organised their lives according to the rhythms of the Brehon law system.

Beyond its location in the Glaspatrick townland and its classification as a rath, detailed information about this particular site is not yet publicly available, and little can be said with confidence about its current condition, dimensions, or precise setting within the landscape.