Epano Phournos tomb dates 1550-1450 BC is one of the three earliest tholoi known at Mycenae.
See:
- Dudley J. Moore: In Search of the Classical World: An Introduction to the Ancient Aegean, Cambridge Scholars Publishing, 2015, pp. 45-46
- https://cudl.lib.cam.ac.uk/view/PH-CLASSICS-MCNE-00003-00001-00003/1