Siena Cathedral

1. Tragbar, Klaus (2015): Constructing A Cathedral. Notes On The Construction Management Of Siena Cathedral. Presented at: Fifth International Construction History Congress, Chicago, 06/2015, pp. 455-464.
2. Tragbar, Klaus (2009): Constructing Siena Cathedral. Sources and Observations on the Use of Brick in the Middle Ages. Presented at: Third International Congress on Construction History, Brandenburg University of Technology Cottbus, Germany , 20th-24th May 2009.
3. Bartoli, Gianni / Betti, Michele / Facchini, Luca / Orlando, Maurizio (2012): Non-destructive characterization of stone columns by dynamic test: Application to the lower colonnade of the Dome of the Siena Cathedral. In: Engineering Structures, v. 45 (December 2012), pp. 519-535.

   https://doi.org/10.1016/j.engstruct.2012.06.024

4. Bussagli, Marco (2005): Qu'est-ce que l'architecture?. Une histoire de l'Architecture. Editions Gründ, Paris (France), pp. 272-273.
5. Tragbar, Klaus (2018): Siena 1357. The failure of a great plan. Presented at: 6th International Congress on Construction History (6ICCH 2018), July 9-13, 2018, Brussels, Belgium, pp. 43-49.