The Luxembourg Socialist Workers’ Party (Luxembourgish: Lëtzebuerger Sozialistesch Aarbechterpartei French: Parti Ouvrier Socialiste Luxembourgeois German: Luxemburger Sozialistische Arbeiterpartei) abbreviated to LSAP or POSL is a social-democratic political party in Luxembourg. The LSAP is the second-largest party in the Chamber of Deputies having won 13 of 60 seats at the 2009 election and has one seat in the European Parliament.