Which football team won a La Liga trophy in the season that started on 29 August 1998 and finished on 20 June 1999?
1998–99 La Liga The 1998–99 La Liga season, the 68th since its establishment, started on 29 August 1998 and finished on 20 June 1999.
1998–99 Celtic F.C. season The 1998–99 season was the 112th season of competitive football by Celtic. Celtic competed in the Scottish Premier League, UEFA Cup, Scottish League Cup and the Scottish Cup.