In 1923, together with a group of activists, he founded "Association of Construction of Polish Churches" ("Towarzystwo Budowy Kosciolw Polskich"), which was a counterbalance to local churches, where German priests were in the majority. Due to his efforts, in 1924, local Poles received former military complex in Langfuhr, where "St. Stanislaus Church" was opened in May 1925. The church quickly became one of the most important centers of Polish community of the Free City of Danzig, where numerous celebrations took place. Between 1933 and 1934, Komorowski was the only Polish member of the 54-person City Council of the city. He ran in the 1933 election to the Popular Assembly (Volkstag), but lost. For a few weeks in 1935, Komorowski served in the Assembly, for Erazm Czarnecki, who had temporarily left Danzig, after that, he ran in the 7 April 1935 election, losing again. Later on, he founded Gmina Polska Association of Poles, and was a very active member of the Polish community. On 10 October 1937, the Bishop of Danzig, Edward O'Rourke, nominated Komorowski to the post of a parish priest of the so-called personal parishes, which served Polish minority of the city. However, under pressure of Danzig's national socialists, O'Rourke's decision was cancelled by the authorities of the Free City of Danzig. As a result, the Bishop resigned from his post, and was replaced by Karol Maria Splett, who did not give permission to create Polish personal parishes. Father Komorowski, who also served Polish students in Danzig, supported and protected them on several occasions. On 25th anniversary of his service, 2 April 1939, a special mass took place in St. Stanislaus Church, which turned into a patriotic demonstration. Among the faithful, there was General Commissioner of Poland in Danzig, Marian Chodacki. On 1 September 1939, Father Komorowski together with other Polish priests, was arrested, beaten, and sent to a prison in Danzig’s Victoriaschule. Soon afterwards, the Germans placed him in Stutthof concentration camp. Polish World War II survivor Roman Chrzanowski wrote in his book ""Gdańsk 1939"": "I remember when a week after my arrival, Father Komorowski was taken out of some basement. He was led to the middle of a field, where he was knocked unconscious.