This vowel chart gives a general idea of the vowel space of Old Catalan. It is not meant to be a precise mapping of the tongue positions, which would be impossible to do anyway since there are no native speakers of Old Catalan. To a large extent, it is based on the vector vowel chart of Tiberian Hebrew drawn by Mr KEBAB.
This vector image includes elements that have been taken or adapted from this file:
Tiberian Hebrew vowel chart.svg: Mr KEBAB (talk)
IPA_vowel_trapezium.svg: Moxfyre (talk)
Ga_open_allophones.svg: Angr (talk)
derivative work: Sol505000 (talk)