The eastern church was built in the 10th century, then enlarged at the beginning of the 13th century by Sebastocrator Kaloyan ... complete and perfectly preserved monuments of east European medieval ...

A scientific analysis of dozens of 12th- and 13th-century books found in European monasteries reveals they were bound in sealskins procured by Norse traders from as far away as Greenland.

A fragment of manuscript found in the book binding of a 16th-century archival register was actually a famed King Arthur ...