Answer: Congress of Vienna was a conservative answer to everything new what revolution brought.
Explanation: Congress of Vienna initated a closer collaboration between European governments to suppress all possible focal points of revolutionary events. A good example is a so-called "three liberal years" (1820-23) in Spain. At that time Spanish liberals forced the king Ferdinand VII to rule as a constitutional monarch. Other European monarchies organized a congress which opted for military invasion. Liberals were defeated and absolute rule of Ferdinand VII was re-established.