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Hvolfþak
From Wikipedia, the free encyclopedia
Hvolfþak er algengt form í byggingarlist sem líkist holu efra hvolfi hnattar. Hvolfþök eru ekki alltaf fullkominn hálfhringur heldur geta verið öskjulaga í þversniði. Egglaga hvolfþak var nýjung sem einkenndi barokktímabilið.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Petersdom_von_Engelsburg_gesehen.jpg/640px-Petersdom_von_Engelsburg_gesehen.jpg)