Thomas Christiansen TarÃn (born 11 March 1973) is a retired footballer who played as a striker, and is the manager of Belgian club Royale Union Saint-Gilloise.
Left-footed, he played for a number of clubs in Danish, Spanish and German football over a 15-year professional career, being crowned the top goalscorer of the 2002–03 Bundesliga whilst with Bochum.
Christiansen was born in Denmark and also has Spanish citizenship.
He represented Spain at under-21 and senior level.