Cantons of Switzerland the canton of Schwyz. Six of the 26 cantons are traditionally, but no longer officially, called "half-cantons" (, , , ). In two instances (Basel and Appenzell) this was a consequence of a historic division, whilst in the case of Unterwalden a historic mutual association, resulting in three pairs of half-cantons. The other 20 cantons were — and in some instances still are — though only in a context where it is needed to distinguish them from any half-cantons, typically termed "full" cantons in English. The historic half-cantons, and their pairings, are still recognizable in the first article of the
Flags and arms of cantons of Switzerland arranging cantonal insignia in shields ("escutcheons") as coats of arms arises in the late 15th century. The "Tagsatzung" in Baden was presented with stained glass representations of all cantons in ca. 1501. In these designs, two cantonal "escutcheons" were shown side by side, below a shield bearing the Imperial Eagle and a crown, flanked by two banner-bearers. Based on these, there arose a tradition of representing cantonal arms in stained glass ("Standesscheiben"), alive throughout the early modern period and continued in the modern state. The flag of Zürich is derived from a blue-and-white design attested since the 1220s, the diagonal