Question: What is the place of birth of Nadia Benois's father?

Knowledge 1: Nadia Benois
Nadezhda Leontievna Ustinova (Надежда Леонтьевна Устинова), née "Benois" (Бенуа), better known as Nadia Benois (1896–1975), was a Russian painter of still life and landscape, and stage designer.Her father Leon Benois belonged to the Benois family.Nadezhda studied how to be an artist at St. Petersburg Academy of Fine Arts.In 1920, Benois moved along with her husband, Jona Ustinov to London.In the course of her travels, Benois painted the impressionist landscapes of London street, Wales, Ireland, and Scotland.She exhibited her works in the Goupil, Redfern, Beaux-Arts, and other galleries, and is mentioned in multiple Journals from the Royal Arts Society.Some of her still-lives were acquired by the Tate Gallery in 1936.She also designed the stage for the ballet "Cap over Mill", which was part of the "Dark Elegies".Later in life, Benois used her talents to help the career of her son Peter Ustinov, who won the Benjamin Franklin medal in 1958, by formatting the screenplays and plays and creating costumes and sets for the films "Vice Versa" and "Private Angelo". [SEP] Knowledge 2: Leon Benois
Leon Benois (1856 in Peterhof – 1928 in Leningrad) was a Russian architect from the Benois family.
Knowledge 1: Nadia Benois
Nadezhda Leontievna Ustinova (Надежда Леонтьевна Устинова), née "Benois" (Бенуа), better known as Nadia Benois (1896–1975), was a Russian painter of still life and landscape, and stage designer.Her father Leon Benois belonged to the Benois family.Nadezhda studied how to be an artist at St. Petersburg Academy of Fine Arts.In 1920, Benois moved along with her husband, Jona Ustinov to London.In the course of her travels, Benois painted the impressionist landscapes of London street, Wales, Ireland, and Scotland.She exhibited her works in the Goupil, Redfern, Beaux-Arts, and other galleries, and is mentioned in multiple Journals from the Royal Arts Society.Some of her still-lives were acquired by the Tate Gallery in 1936.She also designed the stage for the ballet "Cap over Mill", which was part of the "Dark Elegies".Later in life, Benois used her talents to help the career of her son Peter Ustinov, who won the Benjamin Franklin medal in 1958, by formatting the screenplays and plays and creating costumes and sets for the films "Vice Versa" and "Private Angelo". [SEP] Knowledge 2: Takayama Tomoteru
He was the father of Takayama Ukon, and was a Kirishitan.
Knowledge 1: Nadia Benois
Nadezhda Leontievna Ustinova (Надежда Леонтьевна Устинова), née "Benois" (Бенуа), better known as Nadia Benois (1896–1975), was a Russian painter of still life and landscape, and stage designer.Her father Leon Benois belonged to the Benois family.Nadezhda studied how to be an artist at St. Petersburg Academy of Fine Arts.In 1920, Benois moved along with her husband, Jona Ustinov to London.In the course of her travels, Benois painted the impressionist landscapes of London street, Wales, Ireland, and Scotland.She exhibited her works in the Goupil, Redfern, Beaux-Arts, and other galleries, and is mentioned in multiple Journals from the Royal Arts Society.Some of her still-lives were acquired by the Tate Gallery in 1936.She also designed the stage for the ballet "Cap over Mill", which was part of the "Dark Elegies".Later in life, Benois used her talents to help the career of her son Peter Ustinov, who won the Benjamin Franklin medal in 1958, by formatting the screenplays and plays and creating costumes and sets for the films "Vice Versa" and "Private Angelo". [SEP] Knowledge 2: Eystein Glumra
Eystein Glumra(" Eystein the Noisy" or" Eystein the Clatterer"; Modern Norwegian" Øystein Glumra") also known as Eystein Ivarsson, was reputedly a petty king on the west coast of Norway, during the 9th Century.The" Heimskringla" saga states that Eystein Glumra was the father of Rognvald Eysteinsson and Sigurd Eysteinsson:" The first earl in the Orkney Islands was called Sigurd, who was a son of Eystein Glumra, and brother of Ragnvald earl of More.After Sigurd, his son Guthorm was earl for one year.After him Torf- Einar, a son of Ragnvald, took the earldom, and was long earl, and was a man of great power".According to the" Orkneyinga Saga", Eystein Glumra was the son of Ivar the jarl of Uplanders and grandson of Halfdan the Old." Orkneyinga Saga" also named Eystein Glumra as the father of Rognvald Eysteinsson:" Heiti, Gorr ’s son, was father of Sveiði the sea-king,[ who was] the father of Halfdan the old,[ who was] the father of Ivar the Uplanders ’ earl,[ who was] the father of Eystein the noisy,[ who was] the father of earl Rognvald the mighty and wise in council".Linnea Hartsuyker's booksThe Half- drowned King and The Sea Queen cover the lives of Eystein's children.

Answer: Peterhof