A 12th century copy of Africa according to Ptolomy


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Riccobaldi Ferrariensis (1312) from Italy
Locis Orbis et Insularum et Marium.

(Passages in literary works on Islands and Seas)
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Riccobaldo of Ferrara (1246 - 1320) was a medieval Italian notary, geographer and encyclopedist.

He was born in Ferrara. Works by Riccobaldo, include his geographical compilations, one of which, the De locis orbis, was published for the first time only in 1986, while the other, De origine urbium Italie, had in 2013 still not been published. His compilation is made from classical sources.

Taken from: www.thelatinlibrary.com
                     spfm.unipv.it
He wrote his geography based on, as far as East Africa is concerned, two classical authors.

...Second is the gulf Indicus, as yet the biggest. Of the islands in it there are the ones named Azanium (1), the Gulf (Indicus) splits into the
known Persicum and Arabicum.
(this he repeats three times in his book)
.....Now a description of the islands in the ocean. We start with the Indian Ocean there where it is called Azanium or Rubrum (2) Sea.
The Indian Ocean of India Serican has in the Northern part 15 islands, difficult to find. Beyond there where the Indian rivers join the Indian
Ocean is Azanium (1) or Rubrum (2) Sea and are the islands Chrise and Argire (not in east Africa) who produce lots of metals. The Ocean then
continues to Sericum (China) or Eoum.
There are in those islands of Azanio or its Rubrum Sea (2) many incredible things to see and to hear. Of these two gulfs of Azanium (1), Persicum
and Arabicum, the smaller of the two is Arabia Eudemon ...(in the Periplus this place is described as the place where ships from the Red
Sea meet the ones coming  from India )
About Azanio Solinus (200-250 AD) declares: ......The sea Azanium (1) goes all the way to the Ethiopian coastal lands, passing the Ethiopian
and Mossilicum (harbor in N-Somalia according to the Periplus)  mountain ridges, thence back to the Athlanticum Oceanum. (the
surrounding Ocean).

(1) Azanium: This is the name for the Zanj coast in Classical times; the Azania of Ptolemy and the Periplus.

(2) Rubrum Sea: The Red Sea.