The USA and many other countries have term limits for the office of the President. On the other hand, some heads of government in (European) parliamentary systems have remained in power for a long time: For example, Angela Merkel has been Chancellor of Germany since 2005 (13 years and counting), Ruud Lubbers was Prime Minister of The Netherlands for 12 years, and Margaret Thatcher had this position in the UK for 11 years.
Are term limits unique to presidential systems, or are there any parliamentary systems with term limits, too? That may either mean limits for the prime minister, or for individual members of parliament. Imposed either by constitution, by law, or by parliamentary rules. For the purposes of this question, I don't count individual party rules on term limits.