LibraryCastles to CathedralsOne card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

HistoryOne small ahaCastle or cathedral

Justinian commissioned this domed Byzantine landmark in Constantinople.

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HistoryOne small aha
Your new ahaHagia Sophia

Hagia Sophia's great dome rests above a square space using curved triangular supports called pendentives. Source: Hagia Sophia

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