What invention made the use of castles as defensive structures meaningless?

The invention of artillery reduced the importance of knightly castles to almost zero. That is, fortresses with bastions were still relevant in the 19th century, they could then withstand a siege. The knightly army was of little use against the army, which consisted of infantry with muskets or arquebusses and artillery. The first experience of using cannons in the draft of castles was noted around 1380 in France. In Russia, on the contrary, guns were first used around 1382, but during the defense of the city.