thumb|left|Siam in 1900 thumb|300px|right|Ananta Samakhom Throne Hall, the royal reception hall built in European architectural style. Construction was started by Rama V, but was completed in 1915. The successor of King Chulalongkorn was King Rama VI in October 1910, better known as Vajiravudh. He had studied law and history at the University of Oxford as the Siamese crown prince in Great Britain. After his ascension to the throne, he forgave important officials for his devoted friends, who were not part of the nobility, and even less qualified than their predecessors, an action which had hitherto been unprecedented in Siam. In his reign (1910–1925) many changes were made, which brought Siam closer to modern countries. For example, the Gregorian Calendar was introduced, all the citizens of his country had to accept Family names, women were encouraged to wear skirts and long hair fringements and a citizenship law, Principle of the "Ius sanguinis" was adopted. In 1917 the Chulalongkorn University was founded and school education was introduced for all 7 to 14-year-olds.
thumb|left|Siam in 1900 thumb|300px|right|Ananta Samakhom Throne Hall the royal reception hall built in European architectural style Construction was started by Rama V but was completed in 1915 The successor of King Chulalongkorn was King Rama VI in October 1910 better known as Vajiravudh He had studied law and history at the University of Oxford as the Siamese crown prince in Great Britain After his ascension to the throne he forgave important officials for his devoted friends who were not part of the nobility and even less qualified than their predecessors an action which had hitherto been unprecedented in Siam In his reign (1910–1925) many changes were made which brought Siam closer to modern countries For example the Gregorian Calendar was introduced all the citizens of his country had to accept Family names women were encouraged to wear skirts and long hair fringements and a citizenship law Principle of the "Ius sanguinis" was adopted In 1917 the Chulalongkorn University was founded and school education was introduced for all 7 to 14-year-olds