|Creator||Jacobo de Testera|
|16th to 19th centuries|
|This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets and transcription delimiters.|
Testerian is a pictorial writing system that was used until the 19th century to teach Christian doctrine to the indigenous peoples of Mexico, who were unfamiliar with alphabetic writing systems. Its invention is attributed to Jacobo de Testera, a Franciscan who arrived in Mexico in 1529.