Directions:

Societé de Lecture (Old University), where Marignac performed his research in 1865 differentiating tantalum and niobium, Grand Rue, 11 - N46 12.14 E06 08.70
Uni Bastion (New University), which opened in 1871, where Marignac moved for his later research, Rue de Candolle, 5 - N46 11.93 E06 08.65
Marignac Home, where he moved in 1878, and where he performed his research in his discovery of gadolinium and ytterbium after retirement from the university, Rue Jean-Sénebier, 16 - N46 11.84 E06 08.88
"2" = home of Marignac before 1878, Rue des Granges, 4 - N46 12.10 E06 08.69
"3" = École de chimie, built in 1878, about which confusion sometimes occurs regarding Marignac, who never was employed there nor did any research there, because he retired to his home that same year where he did all his research on gadolinium and ytterbium. The École de chimie is now called Bâtiment des Philosophes, where the Departments of English and of Historical Art and Music reside.