Gothic architecture (12th–16th century, primarily European) is characterised by:

• Pointed arch ✓ — the defining feature
• Flying buttress
• Ribbed vault
• Large stained glass windows

Other options:

• Barrel vault = Romanesque architecture
• Pendentive = Byzantine architecture (used to transition from square base to circular dome)
• Hypostyle hall = Ancient Egyptian architecture (hall with many columns)

Pointed arch is the most iconic and structurally significant Gothic element.