Coat of arms of Vaud

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. Historically, the number of cantons was:

Nidwalden and Obwalden form traditional subdivisions of Unterwalden. Basel-Stadt and Basel-Landschaft, as well as Appenzell Inner- and Ausserrhoden, are half cantons, resulting from the division of Basel and Appenzell, respectively. The Swiss Federal Constitution of 1999 abandoned the use of the term "half-canton" as an official designation, so that the official number of cantons became 26 - the former half-cantons being now referred to as "cantons with half a cantonal vote" officially, even though they are still commonly referred to as" half-cantons".

With the exception of Lucerne, Schwyz and Ticino, the cantonal flags are simply transposed versions of the cantonal coats of arms. In case of Lucerne and Ticino, whose flags consist of fields of different colours divided per fess (horizontally), the coats of arms are of the same colours divided per pale (vertically). The coat of arms of Schwyz has the cross moved from the (hoist) canton to the sinister canton with respect to the flag.

Of the 22 cantonal coats of arms as they stood with the creation of Switzerland as a federal state in 1848, six are simple bicolor designs. Vaud also has a bicolor, but also (against heraldic tradition) an added inscription. The remaining 15 flags include heraldic designs, as follows:

Distinctively, Swiss cantons use square flags.

The coats of arms of the Thirteen Cantons are based on medieval signs, originating as war flags and as emblems used on seals. For war flags, a distinction was made between Banner and Fähnlein, the former was the large war flag used only in the case of a full levy of cantonal troops for a major operation. The latter was a smaller flag used for minor military expeditions. The Banner was considered a sacred possession, usually kept in a church. Losing the banner to an enemy force was a great shame and invited mockery from other cantons.

Pope Julius II in recognition of the support he received from Swiss mercenaries against France in 1512 granted the Swiss the title of Ecclesiasticae libertatis defensores and gave them two large banners, besides a blessed sword and hat. Papal legate Matthias Schiner in addition gave to the Swiss cantons and their associates a total of 42 costly silk banners with augmentations, the so-called Juliusbanner. Some of these banners survive, of the cantonal ones notably those of Zürich and Solothurn.

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