The Order of Canons Regular of Prémontré, also known as the Premonstratensians, the Norbertines, or in Britain and Ireland as the White Canons (from the colour of their habit), are a Roman Catholic religious order of canons regular founded at Prémontré near Laon in 1120 by Saint Norbert, who later became Archbishop of Magdeburg. Premonstratensians are designated by O.Praem (Ordo Praemonstratensis) following their name.

Saint Norbert had made various efforts to introduce a strict form of canonical life in various communities of canons in Germany; in 1120 he was working in the now-extinct Diocese of Laon, in the Picardy province of northeastern France. There, in a rural place called Prémontré, he and thirteen companions established a monastery to be the cradle of a new order. As they were canons regular, they followed the Rule of St. Augustine, but with supplementary statutes that made their life one of great austerity. Norbert was a friend of Saint Bernard of Clairvaux and so was largely influenced by the Cistercian ideals as to both the manner of life and the government of his order. As the Premonstratensians are not monks but canons regular, their work often involves preaching and the exercising of pastoral ministry; they frequently serve in parishes close to their abbeys or priories.

Jan Křtitel Kuchař, or also German: Johann Baptist Kucharz (March 5, 1751, Choteč - February 18, 1829, Prague) was a Czech organist, harpsichordist, music composer and teacher.

Soon after his birth, Kuchař's parents moved to Mlázovice, where he lived out his childhood. He achieved basic music knowledge in Vrchlabí with the organist Alex Thám. Later he studied at jesuit gymnasia in Hradec Králové and Jičín. He was a student of organist Josef Seger. From 1772 he acted as organist in the Kostel sv. Jindřicha v Praze (Church of St. Jindrich in Prague). In Prague, he also began teaching music in the noble Hartig, Buquoy and Příchovský families. He was active in the teaching of singing, piano and composition.

Kuchař was among the first to recognize the genius of W. A. Mozart and started to propagate it. In the year 1786, he most likely played in the Stavovské divadlo at the premiere of The Marriage of Figaro and in January 1787 he became acquainted with Mozart on his Prague visit. On October 28 in the same year, he played together with Mozart on harpsichord at the premiere performance of Don Giovanni. He wrote piano excerpts from both operas, as well as from the opera Così fan tutte. In addition, he composed recitatives for an Italian version of The Magic Flute.