Advokatfirmaet Thommessen AS is a Norwegian law firm founded in 1856. It is one of the largest law firms in Norway and considered as one of country's leading corporate law firms. Thommessen has offices in Oslo, Bergen and London and employs approximately 170 lawyers. It is a full service law firm and provides advice mainly to large Norwegian and international corporations. Independent ranking agencies consistently rank Thommessen as a leading Norwegian law firm and its EU/EEA and competition law practice group is considered one of the best in the country. Thommessen is the Norwegian member of Lex Mundi, a leading worldwide network of independent, leading law firms.