Question: Which country built the Ouvrage Pas du Roc?

Context articles: Ouvrage La Béole
ITC Grand Chola Hotel
Ouvrage Pas du Roc
Belgium in the Eurovision Song Contest 1972
Ouvrage Mauvais-Bois
Ouvrage Saint-Antoine
Ouvrage Bousse
Maginot Line
NATO Ouvrage &quot;G&quot;
Ouvrage Col du Granon

Ouvrage La Béole is a lesser work ("petit ouvrage") of the Maginot Line's Alpine extension, the Alpine Line.
 The ouvrage consists of one entry block and two observation blocks at an altitude of 1548 m .
 The "ouvrage" consists of two entry blocks and one observation block facing Italy.
 The "ouvrage" was manned by 94 soldiers in 1940, under the command of Sub-Lieutenant Caillard.
 Additional blocks were planned but not built.
 The "ouvrage" was never provided with electricity.
 Three more blocks were planned but not built.
The ITC Grand Chola is a luxury hotel in Chennai, India.
 It is the third largest hotel in India after Renaissance Mumbai Convention Centre Hotel and Grand Hyatt, both in Mumbai.
 It is located in Guindy, opposite SPIC building and along the same row of buildings as Ashok Leyland "Towers".
 The building, designed by Singapore-based SRSS Architects, is of mixed-use development with three separate wings and is themed after traditional Dravidian Architecture of the Chola Dynasty.
 The hotel is the ninth "Luxury Collection" hotel of the Starwood Hotels group.
 The hotel, built on over 1,600,000 sq ft, is dubbed the largest stand-alone hotel in the country built with an investment of 12,000 million and has the largest convention centre in the country built on 100,000 sq ft with a 30,000-sq ft pillar-less ballroom.
Ouvrage Pas du Roc is a work ("gros ouvrage") of the Maginot Line's Alpine extension, the Alpine Line.
 The ouvrage consists of one entry blocks, one infantry block, two artillery blocks and one observation block 6 km south of Modane and 1.6 km east of Ouvrage Le Lavoir in the vicinity of the Col de Fréjus.
 The position was incomplete at the outbreak of war in 1940.
Belgium was represented by Serge & Christine Ghisoland, with the song '"À la folie ou pas du tout", at the 1972 Eurovision Song Contest, which took place in Edinburgh on 25 March. "
À la folie ou pas du tout" was the winner of the Belgian national final for the contest, held at the RTB studios in Brussels on 15 February.
 The Ghisolands had previously participated in the Belgian final in 1970.
Ouvrage Mauvais-Bois is a "petit ouvrage" of the Fortified Sector of the Crusnes on the Maginot Line.
 It is located between the "gros ouvrage" Latiremont and the "petit ouvrage" Bois-du-Four, facing the Belgium/Luxembourg border.
 The original plan for the position was for two phases of construction, resulting in a "gros ouvrage" provided with heavy artillery.
 The increase in tension between France and Germany in the late 1930s caused resources to be diverted elsewhere, and only the first three combat blocks were built.
 In 1940 the "ouvrage" was regularly bombarded, but not directly attacked by German infantry.
 When the French military divested itself of the majority of the Maginot fortifications, Mauvais-Bois was the second to be sold.
Ouvrage Saint-Antoine is a work ("gros ouvrage") of the Maginot Line's Alpine extension, the Alpine Line.
 The ouvrage consists of one entry block, one infantry block and one artillery block overlooking Modane on the way to the Col du Mont Cenis.
 Ouvrage Saint-Gobain is just to the north, across the mountain valley.
 Saint-Antoine overlooks the approaches to the Fréjus Rail Tunnel and was part of an ensemble of forts, including Saint-Gobain, Ouvrage Sapey and Fort du Replaton that guarded the French end of the tunnel and the descent from the Mont Cenis pass.
Ouvrage Bousse, also known as Ouvrage Bois de Bousse, is a lesser work ("petit ouvrage") of the Maginot Line in the Fortified Sector of Boulay.
 The "ouvrage" is located between "petit ouvrage" Hobling and "gros ouvrage" Anzeling, near Hestroff in the Bois du Bousse, facing Germany.
 A small position, it was manned primarily by reservists.
 It is noted for the events of 15 June 1940, when it received orders to prepare for an evacuation as German forces advanced along the Line in the Battle of France.
 As the garrison prepared to abandon the position, sabotaging equipment, they destroyed their telephone connection, leaving them unable to receive the order countermanding the evacuation.
 The garrison was captured three days after leaving Bousse.
 Bousse is now managed as a museum and is open to public visitation.
The Maginot Line (French: "Ligne Maginot" , ] ), named after the French Minister of War André Maginot, was a line of concrete fortifications, obstacles, and weapon installations built by France in the 1930s to deter invasion by Germany.
 Constructed on the French side of its borders with Switzerland, Germany, and Luxembourg, the line did not extend to the English Channel because the French military did not want to offend neutral Belgium.
From 1949 to March 10, 1967, France's military operated within the NATO command structure, integrating its air defense system (the "Défense Aérienne du Territoire" (D.A.T.)) with that of NATO through the indirect use of American aid funds.
 Between 1953 and 1958, the D.A.T. built a radar station in an old troops shelter (in French : "abri-caverne") near the fort, called "Ouvrage "G"".
 Called ""Station Maître Radar 60/921"", it was used beginning in 1959, covering an area on the surface of three times the area of the troops shelter.
 Ouvrage "G" complemented "Ouvrage F", another D.A.T. station located at the old Fort François de Guise at Metz, while "Ouvrage H" was established as "Base aérienne" 901 Drachenbronn/"Station Maître Radar 50/921" in the former Maginot Ouvrage Hochwald.
 Ouvrage "G" was equipped with seven radar antennas installed on top of the fort.
 The principal radars are presently located on the Ballon de Servance.
Ouvrage Col du Granon is a lesser work ("petit ouvrage") of the Maginot Line's Alpine extension, the Alpine Line.
 The ouvrage consists of one entry block, one infantry block and one observation block covering the Col du Granon as part of the defenses of Briançon and Grenoble.
 The "ouvrage" lies at an altitude of 2329 m .