Fluting in architecture and the decorative arts consists of shallow grooves running along a surface. The term typically refers to the curved grooves running vertically on a column shaft or a pilaster,
Concave fluting on Doric order columns; Northington Grange, a Greek Revival building of 1804–1817
St Peter's Basilica, Rome, with cable-fluted pilasters and fluted columns
Very untypical spiral fluted columns in the Great Colonnade at Apamea in Syria
Convex-fluted engaged columns at Djoser's funerary complex in Saqqara, Egypt. Before 2600 BC.
The Tuscan order is one of the two classical orders developed by the Romans, the other being the composite order. It is influenced by the Doric order, but with un-fluted columns and a simpler entablat
Fluting (architecture)
…in the Doric order of classical architecture have 20 flutes. Ionic, Corinthian, and Composite columns traditionally have 24. Fluting is never used on Tuscan order columns. Flat-faced pilasters generally have between five and seven flutes. Fluting is always applied exclusively to the shaft of the column, and may…
The Tuscan order illustrated in Regola delli cinqve ordini d'architettvra (1563), by Jacopo Barozzi da Vignola
The five orders, engraving from Vignola's Regola delli cinque ordini d'architettura, 1562; Tuscan on the left.
St Paul's, Covent Garden by Inigo Jones (1633), "the handsomest barn in England"
Baroque Solomonic Tuscan columns of the Monastery of San Francisco, Antigua, Guatemala, unknown architect, early 17th century