Vexillology (from the Latin vexillum, a flag or banner) is the scholarly study of flags, including the creation and development of a body of knowledge about flags of all types, their forms and functions, and of scientific theories and principles based on that knowledge. Flags were originally used to assist military coordination on the battlefield, and have evolved into a general tool for signalling and identification, particularly identification of countries.

Heraldry encompasses all of the duties of a herald, including the science and art of designing, displaying, describing and recording coats of arms and badges, as well as the formal ceremonies and laws that regulate the use and inheritance of arms. The origins of heraldry lie in the medieval need to distinguish participants in battles or jousts, whose faces were hidden by steel helmets.

The tradition and practice of heraldry in Poland dates from the 13th century. Although influenced by French and German heraldic practice, differs in a number of respects. One of the most striking is that a coat of arms does not belong to a single family. Many, sometimes hundreds of unrelated families may use a single coat of arms. Each coat of arms also has its own name. One side-effect of this unique arrangement was that it became customary to refer to members of the nobility (Polish: Szlachta) by both their family name and the name of their coat of arms. (more...)

The flag of the Republic of China, commonly known as Taiwan, was first used in mainland China by the Kuomintang (KMT, Chinese Nationalist Party) in 1917 and was made the official flag of the ROC in 1928. It was enshrined in the 6th article of the Constitution of the Republic of China when it was promulgated in 1947. Since 1949, the flag is mostly used within Taiwan where the Republic of China relocated after having lost the Chinese Civil War to the People's Republic of China.

In Chinese, the flag is commonly described as Blue Sky, White Sun, and a Wholly Red Earth (traditional Chinese: 青天, 白日, 滿地紅; simplified Chinese: 青天, 白日, 满地红; pinyin: Qīng Tiān, Bái Rì, Mǎn Dì Hóng) to reflect its attributes. The canton (upper corner on the hoist side) originated from the "Blue Sky with a White Sun flag" proposed by Lu Hao-tung in 1895 and adopted as the KMT party flag. The "red earth" portion was added by Sun Yat-sen in 1906. After the Republican revolution, the provisional Senate selected the "Five-Colored Flag" as the national flag in 1912. After President Yuan Shikai suppressed the KMT, Sun Yat-sen established a government-in-exile in Tokyo and eventually a rival government in Guangzhou in 1917, using the KMT flag as the national ROC flag. This flag was made the official national flag on December 17, 1928 after the Northern Expedition toppled the Beiyang government. (more...)