Ragnar Klavan joins the Reds as captain of his country Estonia and with more than 100 international caps to his name.
The left-sided defender has spent the last four years at Augsburg and played in both legs when Liverpool beat the Bundesliga side in last season’s last-32 Europa League tie.
Klavan, 30, immediately established himself as a key member of Augsburg’s backline following his transfer from AZ Alkmaar, making at least 30 Bundesliga appearances per season in his four campaigns at the WWK Arena.
A commanding presence who is comfortable playing either centrally or at left-back, Klavan is hugely experienced, having made his senior league debut for first club Elva in his homeland at the tender age of 16 in March 2002.
A move to Tallinn-based club Flora followed, where Klavan won the Estonian league title in 2003, before Eredivisie outfit Heracles came calling two years later.
Klavan - who is set to become only the second Estonian to play in the Premier League after former goalkeeper Mart Poom - moved on to AZ in January 2009, and he helped a side managed by Louis van Gaal claim only the second Eredivisie title in the club’s history later that year.
Following three-and-a-half years with AZ, Klavan made his switch to Augsburg in July 2012.
Strong and committed, he made 25 appearances in his debut campaign at Anfield.