The Geological Society of London (also known as the Geological Society) is a learned society based in the United Kingdom. It is the oldest national geological society in the world and the largest in Europe with over 12,000 Fellows. Fellows are entitled to the postnominal FGS (Fellow of the Geological Society), over 2,000 of whom are Chartered Geologists (CGeol). The Society is a Registered Charity, No. 210161. It is also a member of the Science Council] and is licensed to award Chartered Scientist]to qualifying members.