Gellionnen Chapel (known locally as 'The White Chapel' or Capel Gellionnen) is an open, welcoming, and fully inclusive Unitarian congregation situated high on Mynydd Gellionnen overlooking the Swansea Valley and Swansea Bay. Originally founded in 1692 by Protestant Dissenters and Grade II* listed, the chapel is the oldest Dissenting place of worship in the Swansea Valley and the birthplace of the Welsh Unitarian Society (1802). Today, led by minister Rev. Rory Castle Jones, Gellionnen is widely celebrated for its warm community spirit, radical inclusivity, and active support for LGBTQ+ people, having hosted the first same-sex chapel wedding in Wales in 2016. The community runs a busy schedule of regular gatherings across the chapel and the nearby Graig Trebanos Community Hub & Garden, including weekly Sunday services, Tuesday meditation sessions ('Harmony at the Hub'), Thursday community coffee mornings, 'Soul Stories' Bible explorations, monthly Pub Clubs, LGBT+ faith gatherings, and the popular 'Mountain Mutts' monthly dog walks on the mountain. All services and events are open, bilingual (English/Welsh), and free to attend for all.