Below, I’ve listed several places for you to discover during your stay. You may also visit the Office of Tourism website.
Stanislas Square
Nancy school museum
36/38 rue du Sergent Blandan
Lorraine Museum - Palace of the Dukes
64 main street
Nancy aquarium
34 Sainte Catherine Street
The Majorelle villa
1 rue Louis Majorelle
Fine arts museums
Parks and Gardens
Because Nancy is not only a city, I invite you to discover the surrounding parks and gardens. I’ve only added a few, so you can find out more at the following link
2 steps from Place Stanislas
Sainte Marie Park
38 bis rue du Maréchal Juin 
Parc de la Cure d'Air
54 Marquette Street
Botanical Garden
rue du Jardin Botanique in Villers