Trethomas () is a small village northeast of Caerphilly, southeast Wales, situated in the Caerphilly county borough, within the historic boundaries of Monmouthshire. It neighbours Bedwas and Machen, and forms a council ward in conjunction with those communities. Post 1900 New Town With an original name of Thomastown, it was mainly built by William James Thomas, a co-owner of the Bedwas Navigation Colliery Company, (also of mines in Aberdare in the Cynon Valley). Most of the earlier parts of Trethomas were built in and around 1900 - 1913, when the mine was developing and at the apex of coal production in the South Wales coalfield. The terraced streets of Trethomas were appropriately named, some were named after members of William Thomas's family, hence the names: William, James, Thomas, and Mary. Others involved association with local areas, such as Navigation Street (associated with the Bedwas Navigation Colliery Company), Coronation Street (for Queen Elizabeth II's coronation in 1953), Redbrook Avenue after Redbrook House, which once stood on the left of the road entering the village from Machen (opposite the Chequered Flag petrol station), until its demolition in the late 1950s. It was named after the brook that ran nearby and coloured red with rust from the old drift mine that was situated at Glyn Gwyn - now redeveloped as Addison Way leading up to Graig-Y-Rhacca. The bridge over the now demolished railway line on Addison Way was built on the remains of the coal tipping from the mine. History The oldest building in Trethomas was the Ty'n-Y-Pwll Inn, known locally as the 'Pyke' (Turn-Pike in English) due to the building being the original Toll House where tolls were charged for the use of the Toll road between Caerphilly and Newport. After closing as a public house the building sat empty and unused for many years. Connections Community Hub (CCH) agreed to purchase the building in 2014 and had plans to create a multi-functional hub for the whole community to use but the plan collapsed after the charity behind the scheme could not secure funding. In January 2021, despite local opposition to the plans, permission was granted by Caerphilly Country Borough Council to demolish the now derelict building and replace it with flats. The building was demolished in August of that year. The Brecon and Merthyr Tydfil Junction Railway ran through Trethomas, east to Newport and west to Rhymney, Merthyr Tydfil and Brecon