Attention Restoration Theory is applied to explore the causes and consequences of mental fatigue in clergy and suggest practical interventions to restore cognitive wellbeing. Previous research has investigated the physical and emotional health and wellbeing of clergy, but has largely neglected clergy cognitive wellbeing. Due to the demanding nature of their work, clergy are particularly susceptible to mental fatigue and depletion of their capacity to maintain attention. Symptoms include inability to focus attention, inhibit distractions, make decisions or solve problems. Mental fatigue can be overcome, and cognitive capacity restored, by spending time in restorative environments that allow directed attention to rest.