The Italian club which has won the most titles in Serie A is Juventus. Juventus has won a total of 30 titles ever since the inception of Serie A.
A.C Milan have won most titles.
Glasgow Rangers have won 52 league titles
Juventus FC with 29 titles. (30 If they win the league this year). Then come AC Milan and Inter Milan with 18 titles.
FC Skonto of Latvia has won the most league titles in a row with 14 from 1991 - 2005.
Manchester United is the English Premier League club with most titles. It has lifted the EPL 20 times.
Rangers F.C. with 54