Nikolakplads 23 is a Neoclassical property situated at the corner of Nikolaj Plads and the street Nikolajgade in central Copenhagen, Denmark.

Former residents include scientific illustrator Johannes Eilert Steenfeldt, composer Rudolph Bay and playwright and theatre historian Thomas Overskou.

The narrow street that separated them from the churchyard was simply referred to as Nikolaj Kirkegård (Nicolas' Graveyard).

He was appointed chief of the fire corps in 1810, prompting him to discontinue his career as an architect and master builder.

Pierre Lebouchiere, a language tutor, resided in the building with his wife Biene Neshie, their one-year-old son Carl Lebouchiere, the wife's 11-year-old daughter Jeannette Neshie, their maid Catrine Jørgensen, lodger Henning von Qvalen (1777–1853) and Qvalen's servant Johan Techel.

[4] Rudolph Ratenborg, a commissioner, resided in the building with his wife Kirstine Michelsen, a lodger, a servant and a maid.

[7] Christen Christensen, a gravedigger, probably associated with the adjacent cemetery, resided in the building with his wife Ingeborre Bendixen.

[8] Jens Munck, an innkeeper, resided in the building with his wife Kirstine Pedersdatter, their three children (aged two to ten) and a lodger.

[9] The last household consisted of workman Peder Olsen, his wife Ellen Larsdatter, their two children (aged two and four) and one lodger.

Heinrich Ahrenssen, a textile manufacturer, resided on the ground floor with his five children, four unmarried sisters-in-law and a maid.

[13] Christine Marie Lindhberg, a 58-year-old woman whose husband was absent but provided for her, shared the third floor apartment with two unmarried women, a maid and two male lodgers.

[20] Louis Dujardin, now in his mid-50s and with the title of court wigmaker, was also still residing on the second floor together with his wife, two children and a maid.

[22] Thomas Madsen, a valet, resided on the third floor with his wife Nanny Jensine, their ten-year-old son and a maid.

The chamfered corner bay was dictated for all corner buildings by Jørgen Henrich Rawert's and Peter Meyn's guidelines for the rebuilding of the city after the fire so that the fire department's long ladder companies could navigate the streets more easily.