Medieval Constantinople's Wildest Feud: How One Man Built an Earthquake Machine for Revenge - Medievalists.net
Briefly

In a display of ingeniously malicious engineering, Anthemius devised a steam-powered device that created the illusion of earthquakes, terrorizing his rival Zeno and his guests.
Using large cauldrons, pipes, and intense heat, Anthemius inspired fear in Zeno's upper floor with enough pressure to mimic the sensation of seismic upheaval beneath them.
Read at Medievalists.net
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