National monuments in County Roscommon

Rathcroghan () is a complex of archaeological sites near Tulsk in County Roscommon, Ireland. It is identified as the site of Cruachan, the traditional capital of the Connachta, the prehistoric and early historic rulers of the western territory. The Rathcroghan Complex (Crúachan Aí) is an archaeological landscape with many references found in early Irish medieval manuscripts.

Cistercian abbey

stone in La Tène style in Roscommon, Ireland