Immeuble, 13 rue du Port, Historical monument in Clermont-Ferrand, France.

The building at 13 rue du Port is a residence with a classical facade of cut stone and an entrance portal of local Volvic stone. A lower wing adjoins the courtyard, where a door is carved into a concave curve.

The house at 13 rue du Port was built in the second half of the 18th century, when the cut-stone facade was added. Its staircase, with four central pillars and square balusters, dates from the 17th century and was kept when the new facade went up. The building is listed as a monument historique inscrit.

The wrought-iron work on the window supports and the staircase railing carries rocaille motifs, the shell-and-scroll ornament of the Louis XV years. The same ironwork recurs in the interior rooms, so the fittings match the mid-18th-century facade rather than the older 17th-century stair core.

The house stands on rue du Port, a street in the old centre of Clermont-Ferrand, and its cut-stone facade and Volvic stone portal are seen from the pavement. The courtyard wing with the curved door is set back from the street line. The interior, including the staircase, is private and not open to visitors.

The staircase components from the 17th century integrated into an 18th-century house reveal how older structures were reused during construction. This practice was a practical solution for builders to conserve resources and time.