country_of_citizenship maximilian weyrother
International Organization is a quarterly peer - reviewed ___MASK18___ journal that covers the entire field of international affairs . It was established in 1947 and is published by Cambridge University Press on behalf of the International Organization Foundation . The editor - in - chief is Jon Pevehouse ( University of Wisconsin  Madison ). ___MASK79___ is a federal republic made up of nine states , known in German as Länder ( singular Land ). Since " Land " is also the German word for " country ", the term Bundesländer (" federation states "; singular Bundesland ) is often used instead to avoid ambiguity . The Constitution of ___MASK79___ uses both terms . In English , the term "( Bundes ) land " is commonly rendered as " state " or " province ". The ___MASK3___ , also known by the short name Czechia , is a nation state in Central Europe bordered by Germany to the west , ___MASK79___ to the south , Slovakia to the east and Poland to the northeast . The ___MASK3___ covers an area of with mostly temperate continental climate and oceanic climate . It is a unitary parliamentary republic , has 10 . 5 million inhabitants and the capital and largest city is Prague , with over 1 . 2 million residents . The ___MASK3___ includes the historical territories of Bohemia , Moravia , and Czech Silesia . A hat is a head covering which is worn for various reasons , including protection against the elements , ceremonial reasons , religious reasons , safety , or as a fashion accessory . In the past , hats were an indicator of social status . In the military , hats may denote nationality , branch of service , rank , and / or regiment . Police typically wear distinctive hats such as peaked caps or brimmed hats , such as those worn by the Royal Canadian Mounted Police . Some hats have a protective function . As examples , the hard hat protects construction workers ' heads from injury by falling objects and a ___MASK52___ police Custodian helmet protects the officer ' s head , a sun hat shades the face and shoulders from the sun , a cowboy hat protects against sun and rain and a Ushanka fur hat with fold - down earflaps keeps the head and ears warm . Some hats are worn for ceremonial purposes , such as the mortarboard , which is worn ( or carried ) during university graduation ceremonies . Some hats are worn by members of a certain profession , such as the Toque worn by chefs . Some hats have religious functions , such as the mitres worn by Bishops and the turban worn by Sikhs . The Hofburg is the former imperial palace in the centre of Vienna , ___MASK79___ . Built in the 13th century and expanded in the centuries since , the palace has been the seat of power of the Habsburg dynasty rulers , and today the official residence and workplace of the President of ___MASK79___ . It was the principal imperial winter residence , as Schönbrunn Palace was the summer residence . The Lipizzan or Lipizzaner (, , ), is a breed of horse closely associated with the Spanish Riding School of Vienna , ___MASK79___ , where they demonstrate the " haute école " or " high school " movements of classical dressage , including the highly controlled , stylized jumps and other movements known as the " airs above the ground ." The horses at the Spanish Riding School are trained using traditional methods that date back hundreds of years , based on the principles of classical dressage . Organization of the Petroleum Exporting Countries ( OPEC , , or OPEP in several other languages ) is an intergovernmental organization of 13 nations , founded in 1960 in Baghdad by the first five members ( ___MASK87___ , ___MASK9___ , Kuwait , Saudi Arabia , Venezuela ), and headquartered since 1965 in Vienna . As of 2015 , the 13 countries accounted for an estimated 42 percent of global oil production and 73 percent of the world ' s " proven " oil reserves , giving OPEC a major influence on global oil prices that were previously determined by American - dominated multinational oil companies . Max Ritter von Weyrother ( 1783 -- 1833 ) was Chief Rider of the Spanish Riding School in Vienna from 1813 , and Director from 1814 to 1833 . His grandfather , Adam Weyrother , a previous Chief Rider at the school , may have known de la Guérinière in Paris . Adam Weyrother traveled to Paris frequently . Maximilian ' s father and brother Gottlieb were also Chief Riders at the school . Under Max von Weyrother , the Spanish Riding School became the Mecca for riders of the 19th century . Louis Seeger and E . F . Seidler were his best - known students . The Spanish Riding School of Vienna , ___MASK79___ , is a traditional riding school for Lipizzan horses , which perform in the Winter Riding School ( Winterreitschule ) in the Hofburg . Not only is it a centre for classical dressage , the headquarters is a tourist attraction in Vienna that offers public performances as well as permitting public viewing of some training sessions . The presentation builds on four centuries of experience and tradition in classical dressage . The leading horses and riders of the school also periodically tour and perform worldwide . Centrope is an Interreg IIIA project to establish a multinational region in the Central Europe encompassing four European countries : ___MASK21___ , ___MASK79___ , Hungary and Czech Republic . Bratislava ( or also known by ) is the capital of ___MASK21___ , and with a population of about 450 , 000 , the country ' s largest city . The greater metropolitan area is home to more than 650 , 000 people . Bratislava is in southwestern ___MASK21___ , occupying both banks of the River Danube and the left bank of the River Morava . Bordering ___MASK79___ and Hungary , it is the only national capital that borders two sovereign states . Berlin is the capital and the largest city of ___MASK27___ as well as one of its constituent 16 states . With a population of approximately 3 . 5 million people , Berlin is the second most populous city proper and the seventh most populous urban area in the European Union . Located in northeastern ___MASK27___ on the banks of rivers Spree and Havel , it is the centre of the Berlin - Brandenburg Metropolitan Region , which has about 6 million residents from more than 180 nations . Due to its location in the European Plain , Berlin is influenced by a temperate seasonal climate . Around one - third of the city ' s area is composed of forests , parks , gardens , rivers and lakes . Vienna is the capital and largest city of ___MASK79___ and one of the nine states of ___MASK79___ . Vienna is ___MASK79___ ' s primary city , with a population of about 1 . 8 million ( 2 . 6 million within the metropolitan area , nearly one third of ___MASK79___ ' s population ), and its cultural , economic , and political centre . It is the 7th - largest city by population within city limits in the European Union . Until the beginning of the 20th century , it was the largest German - speaking city in the world , and before the splitting of the Austro - Hungarian Empire in World War I , the city had 2 million inhabitants . Today , it has the second largest number of German speakers after Berlin . Vienna is host to many major international organizations , including the United Nations and OPEC . The city is located in the eastern part of ___MASK79___ and is close to the borders of the Czech Republic , Slovakia , and Hungary . These regions work together in a European Centrope border region . Along with nearby Bratislava , Vienna forms a metropolitan region with 3 million inhabitants . In 2001 , the city centre was designated a UNESCO World Heritage Site . ___MASK21___ , officially the Slovak Republic , is a landlocked country in Central Europe . It is bordered by the Czech Republic and ___MASK79___ to the west , Poland to the north , Ukraine to the east and Hungary to the south . ___MASK21___ ' s territory spans about and is mostly mountainous . The population is over 5 million and comprises mostly ethnic Slovaks . The capital and largest city is Bratislava . The official language is Slovak , a member of the Slavic language family . ___MASK58___ is a unitary parliamentary republic in Central Europe . It covers an area of , situated in the Carpathian Basin and bordered by ___MASK21___ to the north , Romania to the east , Serbia to the south , Croatia to the southwest , Slovenia to the west , ___MASK79___ to the northwest , and Ukraine to the northeast . With about 10 million inhabitants , ___MASK58___ is a medium - sized member state of the European Union . The official language is Hungarian , which is the most widely spoken Uralic language in the world . ___MASK58___ ' s capital and largest metropolis is Budapest , a significant economic hub , classified as an Alpha - global city . Major urban areas include Debrecen , Szeged , Miskolc , Pécs and Gyr .