Problem world builder

hi,
I am creating a map but do not know under which category is the Reichstag you can tell me?

I don't think there is a preset Reichstag building, as far as I know.  The Reichstag on the Berlin map is made by a large composition of other combined buildings, fences, raised land, etc.

and the dome destroyed as they made?

Playmobill used fence posts to create the cupola of the Reichstag.

It must have taken hours for him to make the dome out of fences perfectly.

another thing you can put an image and a sound when you load the map? if so, how can I do?

Sound is initialized automatically, you can add a loading screen though. Use Photoshop, Gimp or any other suitable program to create a loading screen of your choice and save it as mapname.tga (mapname is just a placeholder for your map's original name).

a question.
how to turn objects to the x-y-z? and you know what elements used to build the Reichstag? because for example I can not find the railings that made ​​the dome

You can only turn objects using the shift key, rotating them horizontally.

The object used for the Reichstag's cupola is farmfence_post_01.