1863 is not an “easy” year.
Here is what I found:
First a plaque, in the Brussels municipality of Forest – Vorst, remembering the U.S born poet Stuart Merrill. In this post I have included a portrait of his wife, painted by Jean Delville, a Belgian symbolist artist.
I also found the signature of the Belgian sculptor Jean-André Laumans, displaying the year 1863, in the tympanum of the church of Saint-Boniface.
The year 1863 also appears in a the façade of a house where the name of Laeken – Laken, a suburb, and former municipality in the north-west of Brussels. In the façade the evolution in history of the name of the municipality can be seen. Laken is the last displayed name, together with the year 1863.