Which country claims to be Europe's oldest republic?

• A. Andorra
• B. Monaco
• C. Vatican City
• D. San Marino

Answer: (D)

The main idea is recognizing which European state has a long-standing republican form of government. San Marino is a tiny enclave within Italy that has maintained a republic for many centuries. Its system features an elected legislature, the Grand and General Council, and two heads of state called Captains Regent who serve six-month terms, illustrating continuous republican governance since medieval times. This contrasts with the others: Andorra operates as a diarchy with two princes (not a republic), Monaco is ruled by a prince (a monarchy), and Vatican City is a city‑state governed by the Pope (a theocratic authority). Because of its enduring republican structure, San Marino is widely regarded as Europe’s oldest republic.