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Groined arch and a flying buttress; both are common architectural elements.

Arch

Groined arch and a flying buttress; both are common architectural elements.

"The Basilica of Maxentius has great intersecting vaults, vaulted aisles and buttresses." — Chambers, 1881

Basilica of Maxentius

"The Basilica of Maxentius has great intersecting vaults, vaulted aisles and buttresses." — Chambers,…

Buttress and Flying Buttress.

Buttress

Buttress and Flying Buttress.

"An external brick or stone support to the wall of a building, or to a simple wall." — Williams, 1889

Buttress

"An external brick or stone support to the wall of a building, or to a simple wall." — Williams,…

Flying Buttress, St. Ouen.

Buttress, Flying

Flying Buttress, St. Ouen.

"Flying Buttress of Flank." — Encyclopedia Britanica, 1893

Flying Buttress

"Flying Buttress of Flank." — Encyclopedia Britanica, 1893

In architecture, not standing on a foundation, but supported on a corbel. It is applied chiefly as a decoration.

Hanging Buttress

In architecture, not standing on a foundation, but supported on a corbel. It is applied chiefly as a…

Pinnacle of buttress at York Minster cathedral in York, England.

York Minster Buttress Pinnacle

Pinnacle of buttress at York Minster cathedral in York, England.