1 · POSITION
Armand Moisant was the French engineer and metal-construction entrepreneur whose work with Louis-Charles Boileau at Le Bon Marché helped make the vast iron-and-glass department store technically possible.
2 · YEARS
Armand Moisant lived from 1838 to 1906.
3 · ENGINEER
His authorship belongs to structural engineering and construction rather than architectural styling alone.
4 · MOISANT WORKSHOPS
His metal-construction enterprise became an important French specialist in large iron structures.
5 · LE BON MARCHÉ
The Boucicauts' expanding department store became one of his defining commercial projects.
6 · EIGHT THOUSAND TONNES
Le Bon Marché notes that the store's metal framework reached roughly 8,000 tonnes.
7 · SCALE COMPARISON
The house itself points out that this exceeded the iron weight later used in the Eiffel Tower.
8 · WHY SCALE MATTERS
A department store required huge unobstructed spaces while supporting floors, roofs, crowds and merchandise.
9 · GLASS ROOF
Moisant's engineering supported extensive glazed roofing and daylight.
10 · DOUBLE GLAZING
He and Boileau developed a double-glazing solution to manage condensation and insulation.
11 · CUSTOMER COMFORT
Engineering decisions directly affected temperature, light and the ability to spend time comfortably inside the store.
12 · INVISIBLE HOSPITALITY
Moisant represents the infrastructure layer of hospitality: the guest experiences comfort without necessarily seeing the engineering that produces it.
13 · BOILEAU BOUNDARY
Louis-Charles Boileau owns architectural authorship; Moisant owns the specialist engineering/construction layer.
14 · EIFFEL BOUNDARY
Gustave Eiffel later contributed to technical work, but the popular association of all French iron architecture with Eiffel can erase Moisant's much larger documented role at Le Bon Marché.
15 · BROADER CAREER
Moisant's company worked on numerous major iron structures beyond the department store, supporting an independent engineering People case.
16 · WHY GROUP VII
LHL places him in Designers & Architects with an explicit Engineering designation.
17 · REGISTRY STATUS
No Armand Moisant People entry was identified in the current LHL register context; no number is invented.
18 · CANDOUR
Structural projects are collective by nature. LHL credits Moisant as engineer/constructor within a team including Boileau, the Boucicauts and later technical contributors rather than treating the building as a one-man engineering invention.
19 · CONCLUSION
Armand Moisant shows that hospitality architecture begins below the visible surface. Before a customer can browse beneath a luminous glass roof, someone has to solve span, weight, condensation and construction. Luxury depends on engineering that disappears into comfort. ## Sources 1. Le Bon Marché · Architecture — https://www.lebonmarche.com/en/lbm-gazette-architecture-eiffel-bon-marche.html