The Penllwyn Manor, an old stone building which is now a public house, was originally part of the
Tredegar Estate, and is believed to be the original home of the family of the pirate
Henry Morgan. In 1912, at the 17th-century mill in
Gelligroes amateur wireless operator Artie Moore picked up a distress signal from the
RMS Titanic using wireless receiving equipment. Pontllanfraith was home to a
Welsh coal mining community during the early to mid 20th century, providing homes for men working in a number of local pits such as
Wyllie,
Penallta, and
Oakdale. In 1874 and 1875, Gelligroes Colliery was established, striking the Mynyddislwyn Red Ash vein, although the pits were later abandoned in 1875 due to water problems. In 1914, Lloyd's Navigation Steam Coal Co. Ltd. restarted work at the colliery, but
World War I caused it to stop again. The colliery was abandoned for a second time in 1915. The colliery was used for a final time in 1917 after being acquired by the Tredegar Iron & Coal Co. Ltd., but was abandoned again in 1918. ==2011 census==