Were the Romans aware of the size of Africa, and if so do we have any sources that describe their knowledge of the lands past the Sahara?
Hi! I've rounded up a few previous threads on the Romans and Africa which may be of interest
What did Ancient Romans know about Sub-Saharan Africa? - a still-active post (i.e. not archived, so you can still comment) with a response from /u/Commustar; /u/mizzamir points out that the Phoenicians may have circumnavigated Africa
Greek/Roman/Arab trade routes extended down the eastern coast of Africa as far as Zanzibar/Tanzania. Did they ever try and explore further south along the coast? If not, why not? - more discussion on the Phoenician story
How much did the Ancient Egyptian, Greek, Persian and Roman civilisations know about sub-Saharan Africa? - /u/Tiako reviews the state of knowledge on the region
How far did the Romans make it into the Sahara and the trade routes to West and East Africa? - /u/Commustar takes a close look at East and West African penetration
Is there any evidence of the Romans reaching Sub-Shara Africa and below? - /u/pqvarus, /u/Tiako and /u/georgiusflorentius note far reaches of Rome in Africa
Did the Romans explore the east coast of Africa? - /u/khosikulu discusses Rhapta
Why didn't Rome conquer the rest of the nile or any of sub-saharan Africa? - /u/khosikulu focuses on obstacles
Why did the Romans never expand down the western coast of Africa past the area that is now Morocco? - /u/Enrico_Dandolo discusses more challenges in establishing control
Most of these posts have been archived, so if you have follow-up questions for these or any other users, just ask them here and tag their username to notify them