Sidereus Watches

Limited edition watches hand-built in Ireland.

Sidereus Watches – limited edition timepieces designed and hand built in Ireland

We design and hand-build limited edition watches in rural Ireland. It is here that we find inspiration in the surrounding landscapes, where the legacy of our ancestors and the natural world combine in a beautiful adventure than crosses time.

Our timepieces celebrate the origins of horology and the marking of time in Ireland for over 5,000 years at at Brú na Bóinne. It was here that the earliest farming communities built vast stone monuments, like Newgrange, Knowth and Dowth, to record the sidereal year. Today, we continue the long tradition of marking time in every watch we design and build.

The name Sidereus comes from Sidus, the Latin for star. Sidereus is also a reference to the sidereal year, the time taken for the Sun, when observed from the Earth, to return to the same position in the sky in relation to the stars.

Brú na Bóinne Collection – limited edition timepieces celebrating an ancient horological history

Brú na Bóinne, our inaugural collection of timepieces, is a celebration of our ancestors’ role in the origins of horology and astronomy.

Our watches are bold, contemporary designs that take inspiration from the side elevations of the Stone Age tumuli found at Brú na Bóinne, an area defined by a bend of the River Boyne and one of the world’s most important prehistoric landscapes. These megalithic monuments are inscribed with rock art and inscriptions, all are testament to a prehistoric peoples’ concept of the world: the flat earth, the firmament of the heavens overhead, the Sun, the Moon and the stars.

Watchmakers Alliance

We’re delighted to have been accepted as a Trade Member of the British Watchmakers Alliance, an official trade body established in 2020 to represents, champions and supports the watch and clock making sector across the British Isles.


Six models each limited to just 50 pieces per model. View Collection