Caixa de Rotllan, Neolithic dolmen in Arles-sur-Tech, France.

Caixa de Rotllan is a dolmen of three upright granite slabs set in an H-shaped plan, with a back slab framed by two side slabs, carrying a thick covering slab. The chamber inside measures about 2 m by 1.3 m, opens to the south-south-east and sits within a roughly circular tumulus about 10 m across. The covering slab, 2.60 m long and 1.50 m wide, rests on only three points because the supporting slabs are uneven.

This structure dates from the second half of the 3rd millennium BC when megalithic builders created numerous burial chambers across the Pyrenees. It gained official protection in 1889 when French authorities recognized its historical value and safeguarded it as a heritage monument.

The Catalan name Caixa de Rotllan means "Roland's Tomb", showing that local people long knew the dolmen had been used as a grave. Many megaliths in the Pyrénées-Orientales carry names of mythical figures such as Roland or his enemies the "Moors". Along the same ridge, 1,500 metres north, lies the Palet de Rotllan, a stone linked to the game of palets, which legend says Roland played with huge rocks aimed at the castles of Vallespir.

The site is accessible from Arles-sur-Tech by following hiking trails, with some paths running alongside the Bonabosc river through the valley. Sturdy footwear is essential as the terrain becomes steep and rocky higher up the mountainside.

For centuries this monument served as the boundary marker between the communes of Arles and Montbolo, making it a recognizable landmark for both settlements. This role reveals how deeply the structure was woven into the medieval geography and administration of the region.