page_title: Flags and arms of cantons of Switzerland
section_title: Thurgau
hierarchical_section_title: Flags and arms of cantons of Switzerland / History / Thurgau
caption_attribution_description: Wappen der Kiburg
context_page_description: Each of the 26 modern cantons of Switzerland has an official flag and a coat of arms.
  The history of development of these designs spans the 13th to the 20th centuries.
context_section_description: Like Aargau, Thurgau (Turgovia) was historically a subject territory of the confederacy, and was created as a canton of the Helvetic Republic.
  The flag design is an ad-hoc creation of 1803, based on the two lions in the coat of arms of the House of Kyburg which ruled Thurgau in the 13th century.
  The green-and-white were regarded as "revolutionary" colours in 1803, also introduced in the coats of arms of St. Gallen and Vaud, but the placement of a yellow lion on white is a violation of heraldic principles, and also creates a visibility problem. There have been suggestions to correct this, including a 1938 suggestion to use a solid green field divided by a diagonal white line, but they were not successful.
caption: Coat of arms of the House of Kyburg in the Zurich armorial (c. 1340)
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