Sankt Anna Rotunda, Former Renaissance church in Copenhagen, Denmark.
Sankt Anna Rotunda was a former Renaissance church with a twelve-sided base and a square tower. The building measured 63 meters across with walls that rose to approximately 25.5 alen in height.
Construction began in 1640 under King Christian IV but stopped in 1643 when the Torstensson War drained the kingdom's finances. The project was never completed after that.
The building was dedicated to Saint Anne and locals called it by different names including Bådsmandskirken and Rundekirke before it received its official designation in 1641. These varying names show how different people in the community understood and referred to the place.
The site where this former church once stood is now occupied by Gefion Gymnasium and Geocenter Danmark in Copenhagen Municipality. Modern buildings have replaced the original structure.
Inside, forty-eight columns stood in concentric circles supporting vaulted ceilings with an amphitheater-style raised floor arrangement. This unusual design with the elevated interior created a distinctive space beneath the dome.
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