Ottonian is the alternate-support system is first found in the architecture of which period.
The Ottonian Renaissance (951–1024) was a time of cultural and creative achievement that was inspired by the resurgence of the Holy Roman Empire, and Ottonian architecture borrowed heavily from Carolingian precedents. The merging of classical Mediterranean and Christian architectural forms with Germanic styles characterizes Byzantine architecture. Some traits predict the emergence of Romanesque architecture, which arose in the mid-11th century. The Ottonians placed a high value on mathematics, and the structure's equilibrium and harmony are striking examples of this. This is made clear by the modular layout, in which all of the interior's dimensions are derived from a single square unit and scaled up or down as needed.
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