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.
1990–91 La Liga The 1990–91 La Liga season, the 60th since its establishment, started on September 1, 1990, and finished on June 9, 1991. Barcelona ended Real Madrid's five-year run as champions to seal the title.