* 1862, † 1929,

       He was born in Zabrzeg near Czechowice as the son of a local schoolteacher and organist Józef Londzin and Katarzyna neé Kuboszek. His father was a lover of folk art and an amateur ethnographer, who collected local folk culture artefacts, and who passed on his interests to his son. After leaving the elementary school in Zabrzeg Londzin attended the gymnasium in Bielsko until 1894 and then entered the theological seminary in Olomouc, completing it to become ordained in 1889. He worked as a vicar in parishes in Strumień and Międzyrzecze and in 1890 was transferred to Cieszyn where he was appointed senior vicar and prison chaplain. He also became the editor of the Gwiazdka Cieszyńska, in spite of the disapproval of his superior, the Bishop of Wrocław.
       In 1897 Londzin resigned from his position of vicar and became a religious education teacher in the Polish Gymnasium run by Macierz Szkolna dla Księstwa Cieszyńskiego. He was the secretary and treasurer of Macierz, and from 1903-04 its president. He was also the founder and active member of many other Polish religious and social organisations, e.g. Dziedzictwo bł. Jana Sarkandra dla ludu polskiego na Śląsku (The Heritage of the Blessed Jan Sarkander for the Polish People in Silesia). He initiated the founding of the Silesian Museum in 1896 which collected artefacts from around Cieszyn Silesia linked to Poland’s past. He carried out the job of curator and guardian of the growing number of collections practically alone to the end of his life.
       He was elected to the State Council in Vienna as secretary of the Union of Silesian Catholics in 1907 and 1911 and in August 1914 became a member of the Silesian Branch of the Central National Committee. In October 1918, Londzin, Jan Michejda, representing Polish Lutherans and the socialist Tadeusz Reger were leaders of the National Council of the Duchy of Cieszyn. In the spring of 1919 he took part in the Paris Peace Conference, where he represented Polish interests and fought for the accession of the greater part of Cieszyn Silesia to Poland. In 1919 and 1922 he was elected to the Polish Sejm and in 1928 became a senator. He did not cease his work in Cieszyn, however, managing to bring all the museum collections existing in Cieszyn together into one central museum in Cieszyn’s castle. In 1927 he was elected mayor of Cieszyn, but died while still in office. He was also a local historian, focussing mainly on the history of the Catholic Church. He compiled the first bibliography of Polish prints on the subject of Cieszyn Silesia.