Notre-Dame de Paris

Notre-Dame cathedral is one of France's most famous monuments. Millions of tourists flock to Paris each year to visit this masterpiece of gothic architecture. Renovation works were carried out at Notre-Dame, tying in with the cathedral's 850th anniversary in 2013. UNESCO's International Day for Monuments and Sites -- observed on April 18, 2014 -- raises awareness of the diversity and vulnerability of monuments worldwide and the efforts required to conserve them.VIDEOGRAPHIC