Spending another day studying and digging in the Imperial History Museum's library has proven very successful!
I found a lot on information on the Takmahl, through scholarly writings of the "Signal Cartel" and the published works of Tertius Bathana. Here I summarize the most striking parts:
The Takmahl were a race of humans once part of the Amarr Empire. For reasons that remain unknown, but were very likely related to their Sani Sabik practices, they were exiled from the Empire, and lived for centuries in solitude. They were undoubtedly masters of Cybernetics and Bio-Engineering Technology.Takmahl relics can be found inside The Labyrinth, an anomaly near the central star of the Aphi system, and near the Museum Arcana in the Zimse system, both in the Araz constellation of the Amarr Empire. To enter the museum the Key of the Arcane is needed, that can be found in a relic container near the acceleration gate. Inside the museum the Key to the Labyrinth can be obtained from The Curator, which is required to enter The Labyrinth.
I must visit Aphi and Zimse. And especially this Museum!
