A Constituent National Assembly was elected from various German states in late April and early May 1848 and gathered in St. Paul's Church in Frankfurt am Main on May 18, 1848.
Frederick Engels took part in the uprising in Baden and the Palatinate. On May 10, 1848, he and Karl Marx traveled from Cologne, Germany, to observe the events of the region.
On May 18, 1848, 809 delegates (585 of whom were elected) were seated at St. Paul's Church in Frankfurt to convene the Frankfurt National Assembly. Karl Mathy, a right-center journalist, was among those elected as a deputy to the Frankfurt National Assembly.
On May 22, 1848, another elected assembly sat for the first time in Berlin. They were elected under the law of April 8, 1848, which allowed for universal suffrage and a two-stage voting system.
The citizens of Vienna returned to the streets from May 26 through 27, 1848, erecting barricades to prepare for an army attack. Ferdinand and his family fled to Innsbruck, where they spent the next few months surrounded by the loyal peasantry of the Tyrol.