For history buffs this is a must. Easily accessible by subway, surrounded by a historical square with restaurants but still the environs is easily imagined as it was centuries ago. Strongly recommend a guided tour (in French only) or auto guide, many languages available. Don't be put off that it is off the beaten path. Cannot understand why this is not more publicized. The kings and queens of France are buried here and in some cases the remains have been repatriated. The Basillica has had a long history with the various Royal families. Highlight final resting place of the remains of Marie Antoinette and Louis XVI and many others from the beginning of the various Royal Dynasties.