What is "hochstaden"

Hochstaden was a medieval county in the Rhineland. It existed from the 11th to the 13th century. After the extinction of a senior line, a junior line was created by the connection with the counts of Are-Hochstaden. After the main line Are died out, their property fell to the high Stader line. Finally, Archbishop Konrad von Hochstaden and his brother bequeathed the property to the Cologne archbishopric.