Line 1 is a métro line, which is closed for renovation for a couple of days between Châtelet and Charles de Gaulle-Etoile (NOT the airport)
we will have the Navigo Decouverte card 1-5 zones
You should be fine. The Navigo Decouverte makes life so much easier.
(BTW, we enjoyed our time in your lovely city Christmas before last and cannot wait to go back, hoping to do so within the next two years).
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