What terrorist event was an attempt to destroy the English Parliament building?

The Gunpowder Plot

a "Sons of Liberty" attack

an attack by John Brown

the destruction of an airplane over the English Parliament building

The answer is A. The Gunpowder Plot

In a stone-walled room, several armed men physically restrain another man, who is drawing his sword.

The Discovery of the Gunpowder Plot and the Taking of Guy Fawkes (c. 1823) by Henry Perronet Briggs.

On November 5, 1605, a group of conspirators led by Robert Catesby attempted to destroy the English Parliament on its State Opening by King James I. They planned in secret to detonate a large quantity of gunpowder placed beneath the Palace of Westminster. The gunpowder was procured and placed by Guy Fawkes. The group intended to enact a coup by killing King James I and the members of both houses of Parliament.