Preiser-Kapeller, Johannes. 2024. Restless skies at the turn of the first Millennium AD. Climate fluctuations, astronomic phenomena and socio-political turbulences in 10th and 11th century Byzantium and Japan in comparative perspective. De Medio Aevo 13, 1, 9–34. DOI:https://doi.org/10.5209/dmae.92793