Giovanni Pierluigi da Palestrina
Giovanni Pierluigi da Palestrina ( 1525 – 2 February 1594) was an Italian Renaissance composer of sacred music and the best-known 16th-century representative of the Roman School of musical composition. He had a lasting influence on the development of church music, and his work is considered as the culmination of Renaissance polyphony.
Kostja Zetkin
Konstantin Zetkin, always identified as "Kostja" in family correspondence and in almost all other sources, was born in Paris. Kostja's father, (1850-1889), was a Russian revolutionary and socialist who had suffered persecution on account of his involvement in the Narodniks movement and fled to Leipzig where, as a young man, he had supported himself as a carpenter and become active in student politics. That was how he met the trainee teacher, Clara Eißner (1857-1933). In the context of the recently enacted Anti-Socialist Laws Ossip Zetkin was arrested at a political meeting in 1880, identified as a "burdensome foreigner" (""lästiger Ausländer"") and deprived of his Leipzig residence permit. He moved to Paris where, two years later, he was joined by Clara Eißner. The two had probably become lovers in Leipzig, and now they resumed their partnership. Clara adopted his family name, but the two of them never formally married. According to one source they could not marry because Ossip was unable to obtain the necessary papers from Russia: another version indicates that Clara was reluctant to enter into a marriage which would have caused her to lose her German citizenship. Their two sons, and Kostja, were born in 1883 and 1885.