The Belleek demesne once stretched for over three kilometres along the left bank of the Moy estuary, from the gate lodge on Castle Road as far as Knockatinnole Wood in the north. From here the demesne extended westward to the Killala Road where there was a secondary entrance at a place known as "The Black Woods". During the Irish Rebellion of 1798, a small column of French soldiers advanced through the estate, as part of a reconnaissance group. This gave title to the avenue known as "The Old French Road". Today, the centerpiece of the estate is Belleek Manor (Belleek Castle Hotel) which was constructed between 1825-1831 for Lieut-Col Sir Francis Arthur Knox-Gore, a former Lord-Lieutenant of County Sligo, to designs attributed to the Irish architect John Benjamin Keane. Belleek remained within the ownership of the Knox-Gore family until 1942, when it was sold by William Arthur Cecil Saunders-Knox-Gore (1888-1975) due to mounting costs and rates.