made of reinforced concrete and soapstone (wiki)
See en.wikipedia.org

... restoration after the First World War when the destroyed vaults were replaced with reinforced concrete

Reinforced concrete post & beam frame houses are cited as one of the contemporary architectural types in As-Salt. (nom file p40)

Reinforced concrete was used for several buildings of the Veuve Clicquot estate and for the Charles Heidsieck Pavillon, all on the Saint Nicaise Hill. It was also used for the buildings of the Maison Pol Roger and the headquarters of Champagne Moët & Chandon on the Avenue de Champagne and for the tower of the Castellane estate. (Nomination file, p. 105, 107, 139, 141, 144) - The Church of Saint-Nicaise was made with modern materials, such as reinforced concrete and moulded glass.
See fr.wikipedia.org

From Nomination file "Taut managed to harmonise unusual expressionist details like the reinforced concrete pillars at the loggias whose tipped attachments almost reach the eaves with the cubic strictness of neues bauen" Re the bridge house by Otto Rudolf Salvisberg "The 40 m wide building of reinforced concrete rests on four rows of pillars with narrow cross-section and with its four upper storeys it looks as if it was weightlessly floating between the five-storied adjacent buildings"

The invention of the brisance grenade (which would explode on impact of the target) necessitated the change from masonry to concrete forts.

"Niemeyer chose a bare reinforced concrete as the construction material for all the buildings" (AB ev)

Fort de Douaumont: "with two subterranean levels protected by a steel reinforced concrete roof 12 m (13 yd) thick resting on a sand cushion" (wiki)

"The campus (referred to as the CU: Ciudad Universitaria, or "University City") is an urban enclave within which buildings are compositionally placed upon a large pedestrian open space. In addition to a canonically Modern spatial and programmatic distribution, the high architectural quality of its reinforced concrete and masonry buildings earned the CU a classification in 2007 by UNESCO as a World Heritage site,"

Mériadeck

"In order to protect the whole structure from the pounding of the waves, there is, in addition, a reinforced concrete "cuirass" on the face of the western side of the ring-shaped structure." (AB Ev)

The Art Deco buildings introduced to Mumbai and India new materials and typologies. They were constructed using reinforced concrete (AB ev)

In the 20th century, the use of concrete allowed the replacement of the traditional vaulted arcades of the porticoes. This new material offered new construction possibilities and a new architectural language for the porticoes, as exemplified by the portico building in the Barca district (AB ev)

The Fountain of Diana was built in reinforced concrete, both due to lower construction costs but also to follow the wide versatility that this construction technique allowed to be implemented. (wiki)
See it.wikipedia.org

"the concrete roof slab of the Stone Kitchen" (AB ev)

"The main structure consists of reinforced concrete slabs and steel profiles." (AB ev)

Reinforced concrete is used for the Cobblers' Bridge. (Nomination file, p. 56)

The general structure of the Palais de Chaillot is in reinforced concrete.
See fr.wikipedia.org

Church: "In this project, Niemeyer experimented with reinforced concrete, abandoning the architecture of slabs on columns and creating a parabolic concrete vault—a form until then only used in hangars. " (wiki)

Headframe of the Fosse Dutemple
See fr.wikipedia.org

The Palais Marie et Maréchal Joffre marks an evolution in construction techniques and forms, with the use of reinforced concrete and new materials such as coloured concrete. The Grand magasin « Aux Dames de France » and the Gloria Mansions are also built with reinforced concrete. (Nomination file, p. 75, 97)
See fr.wikipedia.org

Casa Luis Barragan is constructed of reinforced concrete with wooden floor/roof beams

Karlovy Vary: "the construction (1967-76) of the Hotel Thermal Spa meant the destruction of Chebská Street (...). The modern complex includes a Convention Centre and dominates the Teplá River Valley in the northern spa quarter. The monolithic reinforced concrete structure apparently lacks harmony with the historic environment but nonetheless represents a Functionalist style landmark of the post-war socialist era by Czech architects". (Nomination File, p. 452)

"The series showcases innovations such as ... new uses of materials such as steel and concrete" and Unity Temple is "Built entirely out of monolithic reinforced concrete" (AB ev)

Quote from "History of Reinforced concrete": "Oscar Niemeyer (Brasil) built new capital of the country ? Brasilia ? from reinforced concrete."

"For the lintel [of the Gate of the Kiss], the stone plates were mounted on a reinforced concrete lintel." (Nomination file, p. 17)

Reinforced concrete was used for the construction of the Lille and Calais belfries and for the reconstruction of the Arras and Comines belfries. (Nomination file, p. 27, 41)

The Wedding Tower "consists of a clearly detached base level constructed in reinforced concrete, a high tower shaft with exposed brickwork, and a marked roof of glazed brick and sheet copper." – "The formerly five-storey Studio Building was constructed with a reinforced concrete skeleton." (Nomination file, p. 68, 94)

"There are examples of lowlevel reinforced concrete buildings," (AB ev)