The Tau Cross from Killinaboy is now displayed in the Clare Heritage Centre.

The Tau Cross was originally located by the road (serving as a boundary marker?) at Roughan, to the N of Killinaboy (NGR R 25 92). It was removed from this site in 1866, replaced in 1894, and removed again in 1967 to the Clare Heritage Centre, Corofin.

The Tau cross, long considered to be Early Christian or pagan, was identified as a Romanesque boundary marker by Rynne (1962), who compared the style of the heads to other 12thc. heads in Co. Clare, on the Doorty cross at Kilfenora, and the high cross and doorway at Dysert O'Dea. The tau-crozier form is also represented, held by ecclesiastics, on the Doorty cross and on the base of the Dysert O'Dea cross. An incised slab in Killinaboy churchyard, probably of the 13thc. or 14thc., depicts a tau crozier and a bell (Rynne, 162). Harbison (1992, 128-9) suggests a possible reference to SS. Paul & Anthony, or that the cross served as a guide for pilgrims to the church at Killinaboy, and may have copied the design of a hypothetical bronze T-shaped staff reliquary (Harbison, 2000, 57).