I had a chance to visit a 17th century countryhouse today which belonged to a rich family in the 18th century. PEF converted by Darktable. Some edits in Gimp, mostly to remove mobile phones laying around, light switches, room thermostats, fire exit signs, air conditioning units and electric cabling.
Then GMIC for its illustration look filter and Digikam for overall color correction, lens distortion correction (lensfun) for the Sigma 8-16 UWA I used and some perspective correction.
