Through the four-storey building on Number 78 ("Deucalion 2") a medieval alley once passed from Västerlånggatan to Kornhamnstorg and the building facing the square was thus a very narrow block. While the present shape of the building dates back to 1791, the interior was much altered during the second half of the 19th century and the modern shop windows were added in the 20th century. Remains of the buildings located here in the 17th century are, however, still part of the modern structure, together with fractions of the interior.