The Spanish Constitution of 1978 is a fundamental legal document that established Spain as a parliamentary democracy after the end of the dictatorship of Francisco Franco. It was approved by a national referendum on December 6, 1978, and marked a significant transition towards democracy, ensuring civil rights and freedoms for all citizens. The constitution also recognized the diverse cultures and languages within Spain, promoting regional autonomy. This constitution laid the groundwork for a modern Spanish state, creating a system of checks and balances among the branches of government. It also established the Spanish monarchy, with King Juan Carlos I playing a crucial role in the democratic transition, symbolizing unity and continuity in the nation.