Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Kronborg Castle' has mentioned 'Wall' in the following places:
Occurrence Sentence Text Source
The castle consisted of a square curtain wall with a number of stone buildings inside.
King Christian III had the corners of the curtain wall supplemented with bastions in 1558xe2x80x931559.
After the conclusion of the Northern Seven Years' War in 1570, King Frederick II initiated an extension of the advanced bastions to relieve the medieval curtain wall.