Founded in May 1973, RCL was the first Luxembourgian rugby club, established by a group of British expatriates working in Luxembourg City.

The club consisted then and still does today of a mixture of nationalities, cultures, creeds, languages : Belgian, French, English, Irish, Welsh, Scottish, Australian, South African, Portuguese, Spanish, German, Dutch, Italian, Fijian, Norwegian, Luxembourgish, American, New Zealander, Ecuadorian, and Argentinian.

However, RC Luxembourg's application was declared valid in regards to the German rugby federations rules and regulations and the team finished second in the promotion round, earning a place in the 2nd Bundesliga for 2009-10.

[3] The club has in the past recruited several local sportsmen from other sports, including Stéphane Gillet, former Luxembourg national football team goalkeeper, as a back row.

RCL finished fifth in their group in the 2012-13 season and failed to qualify for the championship round, instead entering the second tier DRV-Pokal, but eventually withdrawing from the competition in October 2012.

RCL won the game 35-19 in front of a large crowd at Cessange, reaching the promotion final against StuSta Munich.

RCL beat Munich 18-12, after leading 18-0 at half time, gaining promotion to Bundesliga 1 and now hopes to establish itself in the German topflight for the 2018-2019 season.

In July 2018, the construction of covered spectator stands began and was completed by September 2018, now offering seating opportunities and shelter to the fans and improving the atmosphere at home games.

Beating former German Champion TV Pforzheim with a bonus point win at Stade Boy Konen, RCL secured a spot in the first Bundesliga for the 2019-2020 season.

RCL won the game 35-19 in front of a large crowd at Stade Boy Konen in Cessange, reaching the promotion final against StuSta Munich.

RCL beat Munich 18-12, after leading 18-0 at half time, gaining promotion to Bundesliga 1 and now hopes to establish itself in the German topflight for the 2018-2019 season.

The team built on the progress from the previous year and realised its goals in front of large crowds and support for the knockout stages in Cessange.

Several new arrivals bolstered the player numbers, most notably Michael Cawley on placement from University College Dublin, who shortly after joining was identified by Horan as being the perfect man to lead the team as captain.

Unfortunately Cawley was injured against TSV Handschuhsheim II and was ruled out for the remainder of the regular season, as such club and international veteran Stuart Kelly took over the captaincy.