The building that now houses the restaurant Landmark No. 78 was built betwen 1912 and 1914 by Carlo Hahn on land given to him by his brother-in-law, Giovanni Ferro. Ferro lived next door in the Schiappapietra Mansion. The Hahn house was built to compliment the mansion, and was therefore built in the same architectural style as its more impresive neighbor despite that style, italianate, being 30 years out of date. The Schiappapietra Mansion was demolished in the 1950s, but the Hahn house remained in use as a private residence until 1971 when it was sold and converted into a restaurant. It was during its conversion that the front porch was inclosed and the addition on the eastern side of the building was constructed. The building is named after the landmark number assigned to it by the city of Ventura.
Landmark No. 78 is said to be haunted by the ghost of Rosa, the ghost of an Italian who immigrated to Ventura in the late 1800s with her family. It is said that she was forced into marriage by her father to a man whom she did not love nor loved her. In an attempt to find some happiness in her life, she had an affair. When she became pregnant as a result of this affair, she hanged herself in desperation. It is unclear where she was hanged, but it could not have been in the Carlo Hahn house as it was not yet built. People claim to have seen her staring longlingly out of the round window on the second floor, walking down the staircase in a long elegant dress, in the banquet room, and the woman's restroom.