Question: In French Gothic architecture, Rayonnant (] ) was the period between c. 1240 and 1350, characterized by a shift in focus away from the High Gothic mode of utilizing great scale and spatial rationalism (such as with buildings like Chartres Cathedral or the nave of Amiens Cathedral) towards a greater concern for two dimensional surfaces and the repetition of decorative motifs at different scale, Chartres Cathedral, also known as the Cathedral of Our Lady of Chartres (French: "Cathédrale Notre-Dame de Chartres" ), is a Gothic Catholic cathedral of the Latin Church located in Chartres, France, about 80 km southwest of ?

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Sion Cathedral: Sion Cathedral or the Cathedral of Our Lady of Sion (French: "Cathédrale Notre-Dame de Sion, Cathédrale Notre-Dame du Glarier" ) is the Roman Catholic cathedral in Sion, Valais, Switzerland.  It is the seat of the Diocese of Sion.

Ajaccio Cathedral: Ajaccio Cathedral, officially the Cathedral of Our Lady of the Assumption of Ajaccio (French: "Cathédrale Notre-Dame de l'Assomption de Ajaccio") and also known as the Cathedral of the Assumption of Saint Mary (French: "Cathédrale de l'Assomption de Sainte-Marie" ), is a Roman Catholic church located in Ajaccio, Corsica.  It is the seat of the Bishop of Ajaccio, a suffragan of the Archdiocese of Marseille.  The cathedral is dedicated to the Virgin Mary, and is in the Baroque/Mannerist architectural style.

Notre-Dame Cathedral Basilica of Saigon: Notre-Dame Cathedral Basilica of Saigon (Vietnamese: "Vương cung thánh đường Chính tòa Đức Bà Sài Gòn" or "Nhà thờ Đức Bà Sài Gòn" ; French: "Basilique-Cathédrale Notre-Dame de Saigon" ), officially Cathedral Basilica of Our Lady of The Immaculate Conception (Vietnamese: "Vương cung thánh đường Chính tòa Đức Mẹ Vô nhiễm Nguyên tội" ; French: "Basilique-Cathédrale Notre-Dame de l'Immaculée Conception" ) is a cathedral located in the downtown of Ho Chi Minh City, Vietnam.  Established by French colonists who initially named it "Cathédrale Notre-Dame de Saïgon", the cathedral was constructed between 1863 and 1880.  It has two bell towers, reaching a height of 58 meters (190 feet).

Rayonnant: In French Gothic architecture, Rayonnant (] ) was the period between c. 1240 and 1350, characterized by a shift in focus away from the High Gothic mode of utilizing great scale and spatial rationalism (such as with buildings like Chartres Cathedral or the nave of Amiens Cathedral) towards a greater concern for two dimensional surfaces and the repetition of decorative motifs at different scales.  After the mid-14th century, Rayonnant gradually evolved into the Late Gothic Flamboyant style, although the point of transition is not clearly defined.

Amiens Cathedral: The Cathedral Basilica of Our Lady of Amiens (French: "Basilique Cathédrale Notre-Dame d'Amiens" ), or simply Amiens Cathedral, is a Roman Catholic cathedral and seat of the Bishop of Amiens (currently Jean-Luc Bouilleret).  It is situated on a slight ridge overlooking the River Somme in Amiens, the administrative capital of the Picardy region of France, some 120 km north of Paris.  It is the 19th largest church in the world.

Notre-Dame de Paris: Notre-Dame de Paris (] ; meaning "Our Lady of Paris"), also known as Notre-Dame Cathedral or simply Notre-Dame, is a medieval Catholic cathedral on the Île de la Cité in the fourth arrondissement of Paris, France.  The cathedral is widely considered to be one of the finest examples of French Gothic architecture, and it is among the largest and most well-known church buildings in the world.  The naturalism of its sculptures and stained glass serve to contrast it with earlier Romanesque architecture.

Renaud de Cormont: Renaud de Cormont was a French Gothic Era master-mason and architect who worked on the Cathedral of Notre-Dame in Amiens after his father, Thomas de Cormont, who is believed to have been a disciple of Robert de Luzarches.  There is speculation that Thomas may have been Robert's disciple.  Renaud de Cormont, continued his fathers work on Notre-Dame of Amiens in the 1240s, believed to bring a form of architectural revolution to upper transept and upper choir of Amiens Cathedral through his introduction of a glazed triforium, openwork flyers, and new decorative forms.  Renaud altered the eastern wall of the transept and upper levels of the choir into an ornate glass box held by extremely thin flyers.  This failed monumentally: the triforium had to be replaced, the tracery panels on the flyers crumbled and the transept roses failed.  Of more concern was the fact that the entire eastern half of the building needed to be held up using wooden beams, iron chain, masonry spines and an additional rank of flyers.  Because of this, art historians have likened him to an Icarus whose defective work on the upper transept and choir led to a near disaster, likely a play on the fact that the center of Amines Cathedral contains a labyrinth designed on the floor and his father, or Daedalus in this case, had worked on the cathedral before him.

Bayonne Cathedral: The Cathedral of Saint Mary of Bayonne or the Cathedral of Our Lady of Bayonne (French: "Cathédrale Sainte-Marie de Bayonne" or "Cathédrale Notre-Dame de Bayonne"; Basque: "Santa Maria katedrala" or "Andre Maria katedrala"), commonly known as Bayonne Cathedral, is a Roman Catholic church in the town of Bayonne, France.  It is the seat of the former Bishops of Bayonne, now the Bishops of Bayonne, Lescar, and Oloron.  The cathedral is in the Gothic architectural tradition.

Strasbourg Cathedral: Strasbourg Cathedral or the Cathedral of Our Lady of Strasbourg (French: "Cathédrale Notre-Dame de Strasbourg" , or "Cathédrale de Strasbourg", German: "Liebfrauenmünster zu Straßburg" or "Straßburger Münster"), also known as Strasbourg Minster, is a Roman Catholic cathedral in Strasbourg, Alsace, France.  Although considerable parts of it are still in Romanesque architecture, it is widely considered to be among the finest examples of high, or late, Gothic architecture.  Erwin von Steinbach is credited for major contributions from 1277 to his death in 1318.

Chartres Cathedral: Chartres Cathedral, also known as the Cathedral of Our Lady of Chartres (French: "Cathédrale Notre-Dame de Chartres" ), is a Gothic Catholic cathedral of the Latin Church located in Chartres, France, about 80 km southwest of Paris.  The current cathedral, mostly constructed between 1194 and 1220, is the last of at least five which have occupied the site since the town became a bishopric in the 4th century.

Supporting paragraphs: Rayonnant Chartres Cathedral
Answer: Paris