Mémorial des batailles de la Marne
Chapel located in Marne, in France.
Each edition grades its towns against each other only.

From Courthiézy, the big name within reach is Cathédrale Notre-Dame de Reims, 39 km away. All of it lies outside: 2 places within 5 km of its centre, none in Courthiézy. Among them are a museum and a château.
Beyond Mémorial des batailles de la Marne, there is a château.
Best known first: by how many Wikipedia and sister-site articles cover each place (Wikidata’s count). It isn’t a ranking of how good they are.
The list reaches out to Mémorial des batailles de la Marne, 4.2 km away.
The first 20 on the list, numbered as below. The shape is the commune of Courthiézy; the orange dot is its centre. © OpenStreetMap contributors · commune boundary: IGN
The places here are a museum and a château.
Dark: in Courthiézy. Light: in the communes within 5 km of its centre.
2 places, all within 5 km of its centre, make the list.
Chapel located in Marne, in France.
Nothing is mapped in Courthiézy itself; these are within 5 km of its centre.
The history of Courthiézy → · Parks and trails in Courthiézy →
Out of town, Cathédrale Notre-Dame de Reims (39 km) leads 12 names to know.
AttractionCathédrale Notre-Dame de Reims39 km northeast, in Reims
AttractionChampagne Moët & Chandon26 km east, in Épernay
MuseumPalais du Tau39 km northeast, in ReimsChurchChurchBasilique Saint-Remi de Reims39 km northeast, in ReimsChâteauChâteauChâteau de Condé5.9 km southwest, in Condé-en-Brie
AttractionChampagne Pol Roger27 km east, in Épernay
Art galleryMusée Jean-de-La-Fontaine14 km west, in Château-Thierry
AttractionChampagne Perrier-Jouët27 km east, in Épernay
MuseumHôtel-Dieu de Château-Thierry14 km west, in Château-Thierry
AttractionChâteau de Fère-en-Tardenois19 km north, in Fère-en-Tardenois
AbbeyAbbaye Notre-Dame de Jouarre37 km west, in Jouarre
MuseumMusée des Beaux-Arts de Reims39 km northeast, in ReimsPlaces within 40 km of Courthiézy with an article in both French and English Wikipedia, nearest first.
Nothing is mapped in Courthiézy itself, but within 5 km there are Mémorial des batailles de la Marne and Château de Dormans.
One, in town or within 5 km: Mémorial des batailles de la Marne.
The nearest with articles in both French and English Wikipedia: Cathédrale Notre-Dame de Reims (39 km), Champagne Moët & Chandon (26 km), Palais du Tau (39 km), Basilique Saint-Remi de Reims (39 km).
From OpenStreetMap and Wikidata: named museums, galleries, châteaux, abbeys, gardens, zoos, theme parks and other visitor attractions whose mapped point lies inside the commune of Courthiézy, then those in the communes within 5 km of its centre, and well-known places within 40 km. Houses, ruins and gardens need a sign they’re open to visitors; places marked private, closed or disused are left out. The historic-monument link is the Culture ministry’s Mérimée record. A place that isn’t mapped isn’t listed, so this isn’t everything there is to see.
Sources: OpenStreetMap (© OpenStreetMap contributors, ODbL), Wikidata (CC0: descriptions, websites, Wikipedia articles), the Culture ministry’s Mérimée database (Licence Ouverte 2.0), IGN commune boundaries. Distances are from the commune’s centre point.
Photos from Wikimedia Commons, each under its own licence (our copy, resized).
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.