The Concerto in F minor, composed in 1829-1830, was dedicated to Delfina Potocka, the beloved of Zygmunt Krasinski, mentioned above. More information can be found on NIFC website:
You might also want to listen to this work in one of the many renditions on YouTube:
The building of the National Theater has not survived and the Monument to the Warsaw Uprising of 1944 is now located in this space. To the left is the tall columnade of the Warsaw Courts,surrounded by tents of protesters these days...
The only Mlodziejowski appearing in Chopin-related "persons" on the website of National Fryderyk Chopin Institute in Poland was an artist active in the early 20th century, so there were no personal Mlodziejowski friends or connections worthy of being noted.
Right next to it, at Miodowa 6-8, is the Branicki Palace, now closed to the public and serving as a seat for Warsaw City government. It was built by the aristocratic Branicki family for Prince Jan K. Branicki in 18th century. Burnt down during the bombing of Warsaw by Germans in 1939, it was rebuilt after the war (completed in 1967) on the basis of detailed paintings by Bernardo Belotto Canaletto, whose views of Warsaw helped rebuilt the destroyed city.
While Chopin has not performed in this palace while in Warsaw, his links to the Branickis is through Countess Katarzyna Branicka (1825-1907), to whom he dedicated his last published Waltz,, Op. 64, No. 3, in A flat major, composed in 1846-47. The Countess was just 21 at that time and lived in Paris. She later married Count Adam Jozef Potocki, in 1854, returned to Poland, and went on to become a notable art collector.
According to Mieczyslaw Tomaszewski, this waltz "at first glance, is cheerful, high-spirited, boisterous even. The next moment, however, those first impressions are dispelled. What remains is music that seems to be seeking – relentlessly, but hopelessly – its proper tone, or perhaps a way out, repeating the same pattern on successive tonal planes: in F minor, in B flat major, then in G flat major. Yet the narration does eventually arrive at its goal, which is the music of the trio (in C major), filled with a simple, hushed song in cello timbres. In keeping with the laws of the form (the dance with trio), the music of the beginning, that path-seeking music, returns. Before that, however, transitional music is heard: sketched with a subtle line and endowed with the harmonic half-light of chromatic hues."
Here are various performances of this Waltz, posted on YouTube: http://en.chopin.nifc.pl/chopin/youtube/search/composition_id/261
Just a couple block further down Miodowa Street, if you turn left towards the Castle Square - Plac Zamkowy, you will stand where the Warsaw Conservatory used to be and Chopin's teacher, Jozef Elsner used to live. The street no longer exist, as it was demolished during the post-WWII reconstruction of the Old Town that partly changed the configuration of streets.