There are many famous sights within a 20 minute walk from the hotel.
By Public Transport:
On Metro line 8, Ecole Miitaire station is about 5 minutes away.
RER C is 5 minutes away.
From Gare du Nord:
Take line 4 of the Metro, and get off at Strasbourg St Denis. Change to line 8 towards Balard, and stop at Ecole Militaire.