Cefn Tilla Court, Llandenny, Monmouthshire, Wales, is a country house dating from the mid-19th century. Its origins date from 1616. During the English Civil War, the court was the headquarters of Thomas Fairfax during the siege of Raglan Castle and the terms of the castle's surrender were signed at the house in 1646. By the early 19th century, the court was derelict. In 1856 it was sold by Crawshay Bailey to the Memorial Committee established to commemorate the life of FitzRoy Somerset, 1st Baron Raglan, British commander during the Crimean War. The house was completely rebuilt by Thomas Henry Wyatt and donated to Lord Raglan's heir, Richard Somerset as a memorial to his father. The house is a Grade II* listed building.