Yup. Or if they were rich, "eccentric".

https://en.wikipedia.org/wiki/John_Bentinck,_5th_Duke_of_Por...

> The tunnels under the estate were reputed to have totalled 15 mi (24 km), connecting various underground chambers and above-ground buildings. They included a 1,000 yd (910 m) long tunnel between the house and the riding house, wide enough for several people to walk side by side. A more roughly constructed tunnel ran parallel to this for the use of his workmen.

> The duke was highly introverted and well known for his eccentricity; he did not want to meet people and never invited anyone to his home. He employed hundreds through his various construction projects, and though well paid, the employees were not allowed to speak to him or acknowledge him.

> He ventured outside mainly by night, when he was preceded by a lady servant carrying a lantern 40 yards (37 m) ahead of him. If he did walk out by day, the duke wore two overcoats, an extremely tall hat, an extremely high collar, and carried a very large umbrella behind which he tried to hide if someone addressed him.

> He insisted on a chicken roasting at all hours of the day and the servants brought him his food on heated trucks that ran on rails through the tunnels.

Pugsley's tunnels! The Adams Family old black and white tv show...