This fortification was quickly expanded with water works and a donjon (castle keep).

During this period the castle still kept an armoury of 43 muskets.

The Marquis wanted the castle kept as a living document of Swedish history.

A castle keep dates to the 12th century.

The first three were mostly just castle keeps," he says, "where the king and queen would live.

The castle is now over 500 years in the possession of Sybergs family and kept as private property.

And it might come to that, if the castle keeps cracking up.

Or perhaps castle keep: crossbows and vats of boiling oil come to mind.

It was hardly more than a crude castle keep built of fieldstone.

The castle has two parts: an outside wall with 13 towers and an inside wall and keep.