Damaged in World War I

German shellfire during the opening engagements of the First World War on 20 September 1914 burned, damaged and destroyed important parts of the cathedral

Dendermonde: the Beguine church was burned down by the Germans

"The Basilica of Sant' Apollinare Nuovo .....The present apse is a reconstruction after being damaged during WWI" (Wiki)

The Saints Philip and James Church in Sękowa was damaged during 1914–1915 years of World War I in the Gorlice–Tarnów Offensive. The wooden material was used for trenches and for firewood.
See en.wikipedia.org

Garden-city of Chemin Vert: "The buildings, erected in the second half of the 19th century, suffered major destruction during World War I but were rebuilt as exact copies." (AB Ev) The Pommery production site and Ruinart site on the Saint Nicaise hill suffered great damages during World War I. (Nomination file, p. 96; Tome III, p. 53) - The Avenue de Champagne also suffered great damages, e.g. former buildings of Piper-Heidsieck, Jardin de l'Orangerie, Maison Pol Roger, Hôtel Moët, industrial buildings of Moët & Chandon. (Nomination file, p. 139; Tome III, p. 76, 80)
See fr.wikipedia.org

"Damage to the brickwork of the tower had occurred during WWI and in 1928 restoration works were carried out" (AB)

In July 1918, during the last German offensive in the west, the cathedral fell under fire from the German imperial troops, despite the intervention of the Pope with Emperor Wilhelm II. On April 4, a shell pierced the roof of the choir, without causing much damage. On the 25th of the same month, three shells hit the building. A buttress was then destroyed, the vault of the south aisle of the choir was pierced as well as the paving. A third shell destroyed the first bay of the south triforium and ripped open the organ bellows. A few days later, the vault of the Chapel of the Annunciation was pierced by a shell, the first flying buttress to the south of the apse was destroyed by another and a third hit the exterior of the cathedral near the sacristy.
See fr.wikipedia.org

Bell Tower of the Tserkva of the Birth of the Blessed Virgin Mary (Chotyniec, Poland)

"a German submarine arrived in Village Bay on the morning of 15 May 1918 and after issuing a warning, started shelling the island. Seventy-two shells in all were fired and the wireless station was destroyed. The manse, church and jetty storehouse were also damaged but there was no loss of life" (Wiki)

The access to the torch was closed after the damage sustained on the Black Tom explosion - The damage to the Statue of Liberty was estimated to be $100,000 ($2,273,000 in 2017 dollars using the CPI conversion), and included damage to the skirt and torch (wiki)
See en.wikipedia.org

The Church Saint-Jacques in Compiègne was damaged in World War I, but restored shortly after. (Nomination file)

During the bombings of the First World War a bomb hit the façade of the Cathedral which ruined the upper part.
See it.wikipedia.org

During the 1914-1918 War, the Basin was cut in two by the Front. The occupied eastern section was flooded when the invasion occurred; it suffered lasting damage (AB ev)

"During World War I, in 1914-1915, piers 3 and 4 were blown up with dynamite" (AB)

Spa: "Theatre rebuilt after destruction of the eighteenth century theatre during WW1". (Nomination File, p. 348)

Vie Ferrate built to enable troops to traverse the area / Remains of Gun emplacements, hospitals and trenches / Tunnels built both for protection but also as methods of attack by placing large amounts of explosives under opposing troops. "...The events which cost the lives of thousands and literally devastated the mountain skyline (the Col di Lana and Lagazuoi peaks were blown up by mines), have become history and traces of this international tragedy can still be found in the places themselves (fortifications, trenches, mule-tracks and roads)" (nom file)
See www.holimites.com

Amiens, Arras, Béthune, Comines, Dendermonde, Leuven, Mechelen, Nieuwpoort, Ypres