Question: Which principality did the man, after which Ranier III Nautical Stadium is named, rule?

Context paragraphs:
Neuchâtel Crisis: The Neuchâtel Crisis (1856–1857) was the result of a diplomatic question between the Swiss Confederation and the King of Prussia regarding the rights of the Royal House of Prussia to the Principality of Neuchâtel.  The Principality of Neuchâtel was granted to the King of Prussia in 1707, then was ruled by Napoléon Bonaparte after Frederick William III of Prussia was deposed as Prince of Neuchâtel.  In 1814, the Principality was again granted to Frederick William, and the following year he agreed to allow the Principality to join the Swiss Confederation (which was an alliance of semi-independent states rather than a single country) while remaining under his rule.

La Condamine: La Condamine is the central Ward in the Principality of Monaco.  Its landmarks include Port Hercules, the Rainier III Nautical Stadium, and the Princess Antoinette Park.

Rainier III, Prince of Monaco: Rainier III (born Rainier Louis Henri Maxence Bertrand Grimaldi; 31 May 1923 – 6 April 2005) ruled the Principality of Monaco for almost 56 years, making him one of the longest ruling monarchs in European history.

Rainier III Nautical Stadium: The Rainier III Nautical Stadium is a municipal sports complex on the Route de la Piscine in the La Condamine district of Monaco, in Port Hercules.

Andrew II of Hungary: Andrew II (Hungarian: "II.  András" , Croatian: "Andrija II."  , Slovak: "Ondrej II."  , Ukrainian: Андрій II ; 117721 September 1235), also known as Andrew of Jerusalem, was King of Hungary and Croatia between 1205 and 1235.  He ruled the Principality of Halych from 1188 until 1189/1190, and again between 1208/1209 and 1210.  He was the younger son of Béla III of Hungary, who entrusted him with the administration of the newly conquered Principality of Halych in 1188.  Andrew's rule was unpopular, and the boyars expelled him.  Béla III willed property and money to Andrew, obliging him to lead a crusade to the Holy Land.  Instead, Andrew forced his elder brother, King Emeric of Hungary, to cede Croatia and Dalmatia as an appanage to him in 1197.  The following year, Andrew occupied Hum.

Principality of Volhynia: The Principality of Volhynia was a western Kievan Rus' principality founded by the Rurik dynasty in 987 centered in the region of Volhynia, straddling the borders of modern-day Poland, Ukraine and Belarus.  From 1069 to 1118 it belong to Izyaslavichi who primarily ruled from Turov (see Principality of Turov).  After losing Turov to Monomakhovichi in 1105, the descendents of Izyaslav Yaroslavovich for a few years continued to rule in Volhynia.  From 1154 to 1199 the principality was named Principality of Vladimir when the Principality of Lutsk (1154-1228) was separated.

Levan IV Dadiani: Levan IV Dadiani (Georgian: ლევან IV დადიანი ; died 1694) was Prince of Mingrelia from 1681 until 1691, when he was forced to abdicate and retire to Constantinople, where he died.  A natural son of the preceding Levan III Dadiani, he was the last of the First House of Dadiani to rule Mingrelia, a principality in western Georgia.  The succeeding dynasty were the Chikovani, who assumed the surname of Dadiani and continued to rule Mingrelia until 1867.

Qvarqvare III Jaqeli: Qvarqvare III Jaqeli (Georgian: ყვარყვარე III ჯაყელი ) (died 1535) was a Georgian ruling Prince and Atabeg of Samtskhe-Saatabago during 1518–1535.  Member of the Jaqeli family and son of Atabeg Kaikhosro I Jaqeli.  His failure to capture the throne at the death of his father Kaikhosro may have been caused by the ambition of his uncle Mzetchabuki, who had seized Atabeg's title from him.  Despite of this Mzetchabuk Jaqeli declared Qvarqare as his successor.  During his uncle's reign Qvarqvare actively involved in state affairs.  In 1515 ill Mzetchabuk resigned from the throne and came to the Monastery as a monk.  Qvarqvare couldn't ascend to the Meskhetian throne, because his second uncle Manuchar I had revolted.  Qvarqvare went to Safavid Persia, became vassal of Shah Ismail I and lived at his court in Tabriz until his accession.  In 1518 Qvarqvare commanded Qizilbash army and invaded Samtskhe.  Persians dethroned Manuchar I and placed Qvarqvare on the throne.  Manuchar invited Ottomans to fight against Safavids and overthrow his nephew, but Qvarqvare's forces defeated him at the battle near Erzurum, after which Manuchar escaped to the Ottoman empire. During Qvarqvare's reign Persian influence on Samtskhe was growing day by day.  Because of that Turks greatly damaged the country and especially it's southwestern region.  Meskhetian lords had recognized that under Qvarqvare's rule Samtskhe would finally turn to the Enemy's hands.  They made an alliance with the Georgian kings, Bagrat III of Imereti and Luarsab I of Kartli to end up Jaqelian rule and protect Samtskhe from dominant muslim empires (Ottomans and Safavids.  In 1535 King Bagrat III invaded Samtskhe.  He defeated and captured Qvarqvare III at the Battle of Murjakheti near Akhalkalaki, Georgians had annexed Principality of Samtskhe.  Qvarqvare died in prison.  A few years later, his survived youngest son Kaikhosro II requested Ottomans to expel Imeretian and Kartlian forces from Samtskhe.  In 1545, at the Battle of Sokhoista, Kaikhosro defeated Bagrat III, after which he reinstated his legitimate throne.  Samtskhe became vassal of the Ottoman empire.  Qvarqvare III's descendants ruled Samtskhe-Saatabago (until 1628) and then Childir Eyalet until 1820s.

History of Galicia (Eastern Europe): With the invasion of the Magyars into the heart of the Great Moravian Empire around 899, Slavic tribes of Vistulans, White Croats, and Lendians found themselves under Hungarian rule.  In 955 those areas north of the Carpathian Mountains constituted an autonomous part of the Duchy of Bohemia and remained so until around 972, when the first Polish (western Polans) territorial claims began to emerge.  This area was mentioned in 981 (by Nestor), when Vladimir the Great of Kievan Rus' claimed the area on his westward way.  In the 11th century the area belonged to Poland (1018–1031 and 1069–1080), then reverted to Kievan Rus'.  However, at the end of the 12th century the Hungarian claims to the principality turned up.  Finally Casimir III of Poland annexed it in 1340–1349.  Low Germans from Prussia and Middle Germany settled parts of northern and western Galicia from the 13th to 18th centuries, although the vast majority of the historic province remained independent from German and Austrian rule.

Radu cel Frumos: Radu III the Fair, Radu III the Handsome or Radu III the Beautiful (Romanian: "Radu cel Frumos" ), also known by his Turkish name Radu Bey (1437/1439—1475), was the younger brother of Vlad III and voivode (war-lord or a prince) of the principality of Wallachia.  They were both sons of Vlad II Dracul and his wife, Princess Cneajna of Moldavia.  In addition to Vlad III, Radu also had two older siblings, Mircea II and Vlad Călugărul, both of whom would also briefly rule Wallachia.

Supporting paragraphs: Rainier III Nautical Stadium Rainier III, Prince of Monaco
Answer: Principality of Monaco