1862
Syracuse
The Onondaga salt-springs industry at Syracuse produced approximately 90% of American salt at its 1862 production peak.
On this day
December 21
Cities around the world keep their histories on dates. Here is what happened on December 21 across the 2 editorial events Pyflo has so far catalogued for this date.
2 events
2 centuries
2 countries
2006
The Ruhr Valley (Ruhrgebiet)
was the industrial heart of imperial and Nazi Germany — at peak in the 1950s, the Ruhr produced roughly 80% of German coal and 60% of German steel.
Drawn from the Pyflo Atlas — an interactive timeline of 1,601 editorial events reaching back to 2100 BCE, each pin a deep link into a city's full story. Watch history play out on the map →