One of Europe’s oldest temperature series goes back 300 years: Berlin-Dahlem.
Cyclic behavior. Source: Free University of Berlin/Wikipedia
Readers will note the mean temperatures were warmer than they are today. The 1990s and 2000s were in the mid 1800s.
Moreover, the long-term trend was downward from 1760 to 1990, despite atmospheric CO2 having rising since 1850.