Amiens' Cathédrale Notre-Dame dominates the city by sheer size – it’s the biggest Gothic building in France – but its appeal lies mainly in its unusual style. Begun in 1220 under architect Robert de Luzarches, it was effectively finished by 1269. The west front shows traces of the original polychrome exterior, in stark contrast to its sombre modern appearance. A spectacular summer evening sound and light show shows how the west front would have looked, with an explanation of the various statues on the facade in French and then in English. The interior, on the other hand, is a light, calm and unaffected space. Later embellishments, like the sixteenth-century choir stalls, are works of breathtaking virtuosity, as are the sculpted panels depicting the life of St Firmin, Amiens’ first bishop, on the choir screen. Visitors with strong legs can mount the cathedral’s front towers. One of the most atmospheric ways of seeing the cathedral is to attend a Sunday morning Mass (9am and 10.30am), which is accompanied by sublime Gregorian chants.