The historic Charles Bridge in Prague, Czech Republic, was built over the Vltava River. Construction began in 1357 and continued for around 50 years. How did they build such a large and sturdy bridge back then? This video by Tomáš Musílek gives us a ridiculously quick idea of what was involved in the bridge construction.
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We can only hope the engineers and laborers alike were adequately compensated. -via TYWKIWDBI
(Image credit: Sergey Ashmarin)