The organisation was established in 1921 as a federation of trade unions. Its affiliates have since merged into the LCGB, making it a single trade union with various sectoral bodies.
Organisation By membership, the LCGB is the second-largest trade union in the country, with a little over 40,000 members. The LCGB has its headquarters not far from the central train station in Luxembourg City. On the international scale, the LCGB is affiliated to the
International Trade Union Confederation (ITUC) and the
European Trade Union Confederation (ETUC). On the regional scale ("Grande Région"), the LCGB is a member of the IGR Saar-Lor-Lux/Trier-Westpfalz, the IRS 3 Frontières and the Plateforme syndicale de la Grande Région (PSGR). As such, two EURES-councillors are working at LCGB. ==Former affiliates==