File:Albert B. Koett House, Mutter Gottes, Covington, KY.jpg

English: Built in 1892 by an unknown individual, this distinctive and ornate “wedding cake”-like eclectic Queen Anne and Romanesque Revival-style townhouse stands on Russell Street in the Mutter Gottes Historic District of Covington, Kentucky.

Prior to the construction of the house, according to an 1886 Sanborn Fire Insurance map, the site was home to a wooden duplex, likely built sometime around the mid-19th Century.

The house has a heavily detailed brick facade with decorative brick trim, polychromatic ceramic tiles featuring the busts of Roman emperors, arched two-over-two windows, and a three-tiered front bay window that transforms from being rectangular on the 1st floor, to trapezoidal on the 2nd floor, and semi-circular on the 3rd floor, with the one-over-one windows on this portion of the house featuring multi-colored semi-circular stained glass transoms

The house additionally features many intact historic elements inside, including the original staircase that stretches from the first floor side entrance up to the 3rd floor, original doors and trim throughout, and original tiles and fireplace surrounds on the 1st floor and 2nd floor.

The house, originally a single-family home, featured a garden to the side and several one-story wooden porches on the side and rear, as well as sheds in the backyard.

By the early 20th Century, the house became the home of former Wurlitzer Music Company employee and industrialist Albert B. Koett, born in 1863 in Weimar, Germany, whom founded the Kelley-Koett (Keleket) manufacturing company behind a previous residence on Bakewell Street, where Koett worked with J. Robert Kelley on his innovations to X-Ray machines.

Koett left Wurlitzer in 1905 to work full time with the Kelley-Koett Manufacturing Company with John Robert Kelley, as an innovator and industrialist, innovating the "Keleket" X-Ray machine, utilized widely throughout the United States by the 1920s. The company expanded to the point that it occupied a large building on 4th Street in Covington and an additional building on York Street in Cincinnati's West End.

While owned by Koett, the house was enlarged, adding a masonry addition atop the roof of the two-story rear ell, a wooden addition on the rear of the house over a rear porch, and a new front porch with a red tile roof and wire brick columns.

The house was divided up into several small apartment units in the mid-20th Century after Koett's death, leading to the addition of a metal fire escape to the side, and reconfiguration of the interior, with the house being purchased and rehabilitated in the mid-1980s, returning to usage a single-family home, with a one-bedroom apartment on the third floor.