This world-famous landmark structure has served ever since the days of Napoleon as a symbol of victory for triumphant French troops returning home. -Opening hours : April to September: from 10 a.m. to 11 p.m.; October to March: from 10 a.m. to 10.30 p.m. -Closed: 1st January, 1st May, 8th May (morning), 14th July (morning), 11th November (morning), 25th December -The entry fees 2008 and 2009: adults = 9 €; concessions (18 to 25) = 5,50 €; free admission for children under 18.