Old Keiss Castle: Ruined Sentinel on Caithness Cliffs

A Fortress of the Sinclairs on the Caithness Coast

Old Keiss Castle stands as a weathered sentinel on the cliffs above Sinclair's Bay, embodying the legacy of the Sinclair family, powerful nobles who shaped Scottish history. Constructed in the late 16th or early 17th century by George Sinclair, the 5th Earl of Caithness, the castle was built atop the foundations of an earlier Viking settlement. Its strategic coastal position allowed it to assert dominance over the region and protect Sinclair lands from rival clans and invaders.

Architectural Features and Layout

The castle was originally a Z-plan tower house, rising four storeys with an attic, combining a main rectangular block with two round towers at opposite corners. One tower housed a stairwell capped by a square caphouse, while bartizans—small overhanging turrets—adorned the corners, providing defensive vantage points. The walls, relatively thin and pierced by shot-holes, reflect its dual role as a residence and fortification. Internally, the vaulted basement served storage needs, the first floor contained the great hall, and upper floors were private chambers.

Decline and Ruin Amid Coastal Erosion

By 1700, Old Keiss Castle was already noted as ruinous, with parts collapsing due to the relentless assault of wind and sea spray. The Sinclairs moved their principal residence to the nearby new Keiss House around 1755, leaving the castle to decay. Over time, the cliff beneath the castle has eroded dangerously, causing further structural collapse and rendering the ruins unsafe for exploration. Today, visitors can admire the castle only from a distance, where it remains an evocative symbol of Caithness’s turbulent past.

Historical Significance and Sinclair Legacy

The castle witnessed pivotal moments in Scottish history, including the rise of the Sinclairs and their involvement in major events such as the Battle of Flodden and the Jacobite risings. George Sinclair, the 5th Earl, was instrumental in regaining the Earldom of Caithness in 1681. The castle’s walls have silently observed centuries of clan battles, imprisonments, and political shifts that shaped northern Scotland.

Present-Day Experience and Surroundings

Situated on a rugged cliff-top promontory, Old Keiss Castle offers dramatic coastal panoramas and a palpable sense of history. While the ruins themselves are unsafe to enter, the nearby coastal paths provide excellent vantage points for photography and contemplation of the castle’s storied past. The surrounding village of Keiss, with its fishing harbour and historical sites, enriches the visitor experience with local culture and heritage.

Preservation Challenges and Visitor Considerations

Due to its precarious cliff-edge location and structural instability, access to the ruins is restricted for safety reasons. Visitors should respect these limitations and enjoy the site responsibly from designated viewpoints. The castle’s ruinous state underscores the challenges of preserving coastal heritage sites exposed to natural erosion and weathering.