A World Club Championship for rugby union clubs was held in 1979 in Agen and 1986 in Toulouse.
1986 Tournament
Participant teams: SU Agen (FRA), CA Banco de la Nación (ARG), Stade Toulousain (FRA), RC Farul Constanța (ROM), Fijian Barbarians (FIJ), L'Aquila Rugby (ITA), Ponsonby (NZ), West Brisbane (AUS).
In the semi-final in Toulouse, the home team Stade Toulousain defeated West Brisbane 27-3. In the final (attendance 12,000) Stade Toulousain defeated RC Farul Constanța 47-3, who eliminated Auckland's Ponsonby in the other semi-final.
References
World Club Championship rugby union Wikipedia(Text) CC BY-SA