FC Slovan Liberec ( Czech pronunciation: [ˈslovan ˈlɪbɛrɛts] ), commonly referred to as Slovan Liberec or simply Slovan , is a Czech professional football club based in the city of Liberec . The club is one of the most successful in the Czech Republic, having won three league titles and the domestic cup since 1993. Glass-making company Preciosa a.s. is the current main sponsor of the club.
