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The dolmen of Renote Island, also known as Ty-Lia, is a megalithic monument located on Renote Island in the municipality of Tregastel, Brittany. This site, dated from the Neolithic, is distinguished by its funnel shape, often mistakenly described as covered aisle. It is in fact a "V" grave, measuring 12.75 metres in length, with a width of between 1 and 2.25 metres. The monument has been listed as historical monuments since 1977.

The dolmen is characterized by a structure composed of a natural rock 7 metres long north side, extended by four orthostats, and seven orthostats inclined south side. A blanket table 2.65 meters long by 2.40 meters wide covers the whole, while a second table, broken, rests inside the bedroom. Ancient excavations revealed objects such as a polished stone axe, flint tips and white coral fragments.

Around the dolmen, the remains of a peristalith-like enclosure are visible, and all slabs are made of Ploumanac'h granite. Although searched very early, the site retains traces of its funeral and ritual use. The objects discovered at the beginning of the twentieth century testify to its importance in local neolithic practices.

The precise location of the dolmen is indicated as follows: 5786 Île Renote, 22730 Tregastel, in the Côtes-d'Armor department. The site has been protected since 1977 and its access is subject to the rules of preservation of historical monuments. Available sources, including Wikipedia and Monumentum, confirm its status as an emblematic megalithic site of the region.

The Dolmen de l'Île Renote illustrates the funeral and architectural practices of Neolithic in Brittany. These monuments, often associated with collective rites, marked the landscape and served as memorial sites for local communities. Their construction reflects a complex social organization and advanced mastery of stone size and transport techniques.

Megaliths, such as Renote Island, were generally integrated into sacred landscapes, often near coasts or streams. Their presence bears witness to a sustainable human occupation and a culture rich in symbols and beliefs, centred on the worship of ancestors and the structuring of the territory.

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