Location

Metro/underground: 
Jussieu (lines 7 and 10)
Cardinal Lemoine (line 10)

Bus: 24, 47, 63, 67, 86, 87 and 89

RER B: St Michel-Notre Dame

Public car park: paid secure car park a 5 minute walk away

Directions from:

Airports

Roissy-Charles de Gaulle
Take RER B towards Paris to St Michel-Notre Dame, then take line 10 towards Gare Austerlitz to Cardinal Lemoine.

Orly
Take the Orlybus to Place Denfert Rochereau, take metro line 6 towards Nation to Place d'Italie, then take line 7 towards La Courneuve to Jussieu.
 
Train Stations
Gare de Lyon station: Direct via bus 63 (15 min.)
Gare d'Austerlitz station: Metro line 10, Cardinal-Lemoine station or 20 minute walk.
Gare Montparnasse station: Direct via bus 89 (20 min.)