The York Musical Theatre Company is York's longest established amateur theatre company. It was founded in 1902. It was originally called the York Amateur Operatic and Dramatic Society. It was renamed the York Musical Theatre Company in 2002.

The group gave its first performance in April 1903

The Society's meetings and performances were suspended during World War I 1914 - 1919, and reconvened in 1920. During World War II 1939-1945, performances were again suspended, but started up again from 1946. During the April 1942 air raid on York, many of the early records of the society (1902 - 1939) were destroyed.

The group gained charitable status in 1978.

Resident of York who collected an extensive collection of theatre programmes for performances in York theatres and by York theatre groups.

Joseph Benedikt Kleiser was born in Freiburg in Baden, Germany, in 1823. He was baptised there on 19 March 1823. His parents were Jacob Kleiser and Fransizka Geschwander. He had an older brother, Andreas (later Andrew), born in 1819.
On 12 March 1840, Joseph arrived in London via Calais and Belfast. Andrew (under the name Andreas) had arrived two years previously, on 2 Nov 1839.

By the time of the 1841 census, both brothers were working as clockmakers. Joseph lived and worked in Chelmsford, Essex, while Andrew had settled in York, where he lived on Stonegate along with his business partner, Philip Schwerer.

In 1854, Joseph married Mary Potter in York. They had three sons:
Cuthbert Joseph Kleiser (born 1855)
John Henry Kleiser (born 1857)
Louis Augustine Kleiser (born 1860).

Andrew Kleiser had also married into the Potter family. He married Hannah Potter in September 1847 at the Catholic chapel on Little Blake Street. They had one daughter, Jane Frances. She was born in 1849 but died in 1853, aged about four.

Andrew was naturalised in September 1852, and Joseph was naturalised in April 1854.
Andrew died in January 1885, and Joseph later that year in December. As Andrew had no surviving children, the Kleiser business passed to Joseph's three sons, Cuthbert, John, and Louis..

Cuthbert Joseph Kleiser married Hannah Lilian Cundall, the daughter of Luke and Hannah Cundall, in 1888. They had one son, Louis Cyril Kleiser, born 1893. Cuthbert died in 1929.

John Henry Kleiser never married, and died in 1920, a patient at the York Asylum.

Louis Augustine Kleiser also never married, and died in 1943.

Cuthbert's son, Louis Cyril Kleiser, was also known as 'Cyril'. He was born in 1893 and died in 1977.