He is first mentioned in sources dating from the 9th century.

This seems not to be correct or the session was earlier than mentioned in various sources with the period around 1959/1960.

It is mentioned in written sources from 1229 to 1298.

The town was first mentioned in historical sources from 1231, and it received its city charter before 1311.

Some of these bishops are mentioned again in other sources.

From then on maps are frequently mentioned in Chinese sources.

It is first mentioned in written sources dated to 1271.

It was first mentioned in written sources dating to 1228.

But both are not mentioned in Greek sources by these names.

The fortress is first mentioned in sources from the 10th century.