If no one takes care of it, repairs the roof, etc, it will eventually collapse.
it gets wrinklely
Here are three sentences including the word 'medieval': "Yesterday we went to visit a medieval castle." "He insulted me by saying I was getting so old I would almost be medieval." "Recently a medieval spear head was found in a field near where I live."
Some of the things that might be kept in a castle are portraits of previous owners of the castle, old suits of armor, medieval weapons(used as decorations nowadays), and several other things that can usually be found in castles.
It gets thrown away.
it gets bad
Howls Moving Castle
they faint
it gets wet
they have a baby to a dirty old man...
pay it
The Renaissance Gazette The Medieval Times News The Middle Ages Chronicle The Kingdom Tribune
it gets more sleepy and gets more gray hair and less em mused