Unique Buildings Destroyed?

[Tarannon]

guys when i take over a city playing any faction like when i take over isengard the orthanc gets destroyed
before i attack its there and after i attack and control the city the building just disppears its the same with everything like when i take over moria as dwarf ,the bridge or khazad dum and the chamber of mazarbal just poof
is this a bug or what caus i have the unique building i got from start but when i take over an enemy city the unique buildings there are lost ??????
i can see the buildings with my spies and when i take over the city they are not there anymore?
it is happening with every city and every unique building

[Seleukos_I.]

That happens when you sack/exterminate the cities. Just occupy them and the buildings will stay.

[Bela]

As long as I know, Louis Lux's Visual Enhancement sub-mod contains a fix to this problem.
Check here: http://www.twcenter.net/forums/showthread.php?t=256326