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Cei Tyddyn Isa is a post-medieval quay located in Wales, protected as a scheduled monument by Cadw under reference ME108. The structure sits upon Cambrian sandstone bedrock, a durable foundation formed during the Cambrian period over 500 million years ago. This ancient geological setting provided both the natural harbour conditions and the stone resources essential to medieval and post-medieval maritime communities in Wales.
The quay represents the infrastructure of early modern Welsh coastal trade and commerce. Post-medieval quays such as this served as critical landing places for vessels engaged in regional and longer-distance maritime networks. The sandstone geology of the site would have influenced both the construction techniques employed and the natural tidal conditions that shaped its use.
The monument's survival and protection reflect the importance of understanding Wales's maritime heritage and the material infrastructure that sustained local economies before the industrial period. Physical remains of quays and harbours are relatively scarce in the archaeological record, making Cei Tyddyn Isa a valuable record of how communities exploited their coastal landscape and engaged with water-based transport and trade.
Cei Tyddyn Isa is a scheduled monument protected by Cadw under reference ME108. View the official record →
Cei Tyddyn Isa is a post-medieval quay located in Wales, protected as a scheduled monument by Cadw under reference ME108.
Cei Tyddyn Isa dates from the post medieval period, and is classified as a quay. It is one of over 32,000 scheduled monuments protected across the UK.
Cei Tyddyn Isa is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is ME108.
Several scheduled monuments lie within 10 km, including Bedd Gorfal Ring Cairn (8.5 km), Hut Circle near Gerddi Bluog (8.9 km), Fonlief Hir Standing Stones (9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Cei Tyddyn Isa's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Cei Tyddyn Isa stands on Cambrian sandstone, bedrock that formed in the Cambrian. The rock here is sandstone.