In 1904 Schorr was appointed a lecturer as privatdozent, and in March 1910, associate professor of Semitic languages and history of the Ancient Orient at Lwów University, a chair which he later held in Warsaw.

In 1912 he participated in the international congress of orientalists in Athens, where he was one of the secretaries of the semitology section and presented a lecture entitled "Sumerian and Semitic Beginnings of the Ancient Babylonian Law", which was published in the Paris edition of Revue Semitique.

In the years of his presidency, Schorr organised many initiatives, undertakings, and cultural events, managed the meetings of so-called "speaking diaries" with the participation of renown personalities, writers and publicists.

Through the Warsaw lodge, Schorr co-organised and supported the Relief Committee for the Jewish victims of the economic crisis, continuing his role in the religious affairs of the nomination of rabbis and Orthodox influences.

In the years 1937–1938, a violent anti-Masonic campaign took place in Poland that led to the special decree of 1938 that dissolved any sort of free Masonic societies, including B'nai B'rith.

These two ideas I consider for the highest goal of our spiritual and intellectual program ... Schorr's initiative helped with the creation of the Lodge "Montefiory" in Łódź, then the second largest Jewish urban community in Poland, with 222,497 Jews.

Though Schorr did not take an active part in political life, he participated as a scientific expert in a questionary campaign about the problems of the Jewish community in Poland arranged in February 1919 by the Governmental Commission.

Schorr concentrated mainly on scientific work, teaching, and social activities, rather than politics, but in 1935, the president of Poland Ignacy Mościcki named him Senator in the parliament.

In his parliamentary speeches, along with articles in the Jewish press, such as Nasz Przegląd and Chwila, Schorr expressed his concern about the growth of antisemitism in Poland and the passive conduct of the authorities in this regard.

The Évian Conference, held in Évian-les-Bains on the French shore of Lake Geneva, was convened at the initiative of US President Franklin D. Roosevelt, who invited European, American, and Australian delegates for an open discussion on organising the resettlement and immigration of those who experienced persecution on the basis of religion or race.

In confinement, Schorr was forced to fill in a questionnaire, was photographed, and had his personal belongings taken: his golden watch, pen, scissors, organiser, a file of photos.

The prosecutor noted down only his words concerning his rabbinical functions and an account of the marriage of Schorr's daughter Sophia (residing in Paris) with an official of the Polish Ministry of Justice.

On February 3, the newly appointed Russian prosecutor of the Lvov branch of the NKVD, Lopunov, received an order from the Deputy of the Peoples Committee of the Ministry for State Security V.N.

In Moscow he was held in Lubyanka Prison, in the same cell with the Bund activist Victor Alter, the poet Władysław Broniewski, and the Polish Senator of the National Party professor Stanisław Głąbiński.

I spent 10 days with Prof Schorr and was astonished by his spiritual posture, despite the sufferings, he did not allow himself to get broken and after questioning was coming back calm and full of dignity.

I ask you Sir Minister about the entreatment of our Ambassador in the Vatican with the intervention, aimed to free Professor Schorr, arrested by the Bolshevik powers in Lwów.

Therefore, also today's general works on the history of Polish Jewry, and they are few after all, are characterised by the dilettante forms, lacking integrity, accurateness and clarity in subject presentation.

The fundamental, scientific presentation of the entire history will only be possible when the factual historical, economic and cultural developments in the major cities will be multilaterally studied on the basis of archival sources.

In this work he analyses the relations of Joseph Nasi (1524-1579) with the Polish king Sigismund August (1520-1572) in light of the situation of Jews in Poland at that time.

In 1903 Schorr was awarded the Wawelberg Prize (provided by the famous Polish-Russian banker and philanthropist) for his work Żydzi w Przemyślu do roku 1772 ("Jews in Przemyśl until 1772").

Schorr starts his historical account from the early 15th century, when the first Jews began to appear sporadically in significant numbers in the major cities of Czerwona Rus' Red Ruthenia: Lwów, Halicz, Przemyśl and Sanok.

Among the wide range of sources presented in the second part of the book we find the first fundamental privilege given by king Sigismund II August to the Jews of Przemyśl in 1559, allowing them to live there with the same rights and freedoms as other townsmen (no.

121); the order of the governor of Rus' lands Jabłonowski allowing a free election of a rabbi after the ardent requests of "unfaithful" Jewish elders and the whole synagogue of Przemyśl (no.

The second major stream of Schorr's scientific activity concerns Bible studies (in particular research of Biblical Law), Assyriology, and the history of the Ancient Near East in general.

His first works in Oriental studies included a paper on the excavations and discoveries at Amarna (1900), followed by the investigation of Starożytności biblijne w swietle archiwum egipskiego ("Biblical Antiquities in the Light of the Egyptian Archive").

In this paper Schorr presents and discusses an ancient Babylonian text newly discovered by the Oxford Assyriologist Stephen Herbert Langdon.

Kodeks Hammurabiego a ówczesna praktyka prawna ("The Hammurabi Code and Ancient Oriental Legal Practices") first appeared in Rozprawy (Studies) of the historical department of Kraków Academy of Sciences; in 1907 it was published separately.

Schorr's Urkunden des altbabylonische Zivil- und Prozessrechts ("The Documents of the Old Babylonian Civil and Criminal Law) is considered to be his greatest scholarly achievement in the Oriental field.

He became the spiritual leader in all the spheres of the civic life, on account of his deep Judaic knowledge, organisational abilities and personal favourite pursuits in the subjects of spirit and heart.

He also initiated the centralized unification of all Jewish communities which created a new Collegio rabbinico italiano...in Florence...This seminary produced an array of young Rabbis, who started the spiritual renaissance of Italian Jewry.