Analysis of information sources in references of the Wikipedia article "อัตลัสกาตาลา" in Thai language version.
The Catalan Atlas is conventionally attributed to 1375, because that year is used as the starting-point for the computation of the Golden Number, but 1376 and 1377 are also mentioned in its accompanying texts; it conforms closely to the description of such an atlas in the French royal library catalogue, dated 1380 [...] The Catalan Atlas can be assigned with some confidence to the late 1370s or the early 1380s.