The research discusses the date, authorship, and commissioning of Baroque house Breg 20 in Ljubljana. Based on archival materials and literature, we have reconstructed its ownership in the eighteenth century, when the house was predominantly owned by the Gasparini family. During that period, the building was expanded by incorporating the neighbouring Codelli house and the balcony hall on the second floor was graced with Jožef Jelovšek’s paintings. The main entrance portal was constructed about 1743, when Gasparini was raised to the rank of nobility. It was probably designed by the architect Giovanni Fusconi, who worked in Trieste, but, at least between 1726 and 1747, also paid several visits to Ljubljana.