https://research.uniupo.it/it/publications/from-the-pyrenees-to-the-alps-evidence-of-the-use-of-aerinite-on-/
From the Pyrenees to the Alps: Evidence of the use of aerinite on XII century fresco paintings at...
from thexii centurypyreneesalpsevidence
https://www.nortfort.ru/ladoga/foto6_e/
George Temple (XII century), Fortress (Staraya Ladoga) - Northern Fortress
This is one of the most ancient stone building of Russian North. There is a repair inside, probably the first one from the Ivan's III times. I saw how the...
xii centurystaraya ladogageorgetemplefortress