Question: What is a writer's house and biographical museum and was previously Opekta, a European pectin and spice company?

Context articles: Churchill War Rooms
Storm P. Museum
Maria Skłodowska-Curie Museum
Beit El-Umma
Taha Hussein Museum
Opekta
Ameen Rihani Museum
The Linnaeus Museum
Anne Frank House
Gibran Museum

The Churchill War Rooms is a museum in London and one of the five branches of the Imperial War Museum.
 The museum comprises the "Cabinet War Rooms", a historic underground complex that housed a British government command centre throughout the Second World War, and the "Churchill Museum", a biographical museum exploring the life of British statesman Winston Churchill.
The Storm P. Museum in Copenhagen, Denmark, is a biographical museum dedicated to the life and oeuvre of Danish humorist Robert Storm Petersen, popularly known as Storm P.
 In addition to his cartoons, the museum also displays his paintings, both oils and watercolours, and covers other aspects of his life, time and many-sided talent, as well as his extensive collection of smoking pipes and his studio which has been reconstructed on the first floor.
 The ground floor is used for special exhibitions.
 In connection with a renovation in 2012, the museum has broadened its profile to include humor, satire and cartoons more generally.
The Maria Skłodowska-Curie Museum (Polish: "Muzeum Marii Skłodowskiej-Curie" ) is a museum in Warsaw, Poland, devoted to the life and work of Polish two-time Nobel laureate Maria Skłodowska-Curie (1867–1934).
 The museum, which is sponsored by the Polish Chemical Society, is the only biographical museum in the world devoted to the discoverer of polonium and radium.
Beit El-Umma (House of the People) is a historic house museum and Saad Zaghlul biographical museum in Cairo, Egypt.
Taha Hussein Museum is a historic house museum and biographical museum in Cairo, Egypt.
Opekta, also known as Gies & Co., was a European pectin and spice company that existed between 1928 and 1995.
 It is notable for its Dutch operation being based in the building at "Prinsengracht 263 " that would later become the Anne Frank House.
 Opekta started in Germany, and later expanded into the Netherlands in 1933, at which time Otto Frank moved from Germany to Amsterdam to become managing director of the new Dutch operation.
 Otto Frank was in charge of the manufacturing and distribution of the pectin-based gelling preparations, to be used in jam making.
 The company continued to trade from the same building whilst Otto Frank, his family (including his youngest daughter Anne Frank) and several other Jews hid from persecution stemming from the Nazi Occupation of the Netherlands during World War II.
Ameen Rihani Museum is a biographical museum in Freike, Lebanon.
 It is dedicated to the Lebanese-American writer and thinker Ameen Rihani and was established by his brother Albert Rihani to honor him in 1953.
 The museum underwent renovation in 1986 and now occupies the lower level of the home.
The Linnaeus Museum "(Swedish:Linnémuseet)" is a biographical museum in the Linnaean Garden in Uppsala, Sweden, dedicated to the 18th century botanist Carl Linnaeus.
 It is run by the Swedish Linnaeus Society.
 The house was built by Olaus Rudbeck in 1693 and served as official residence for employees at Uppsala University from the latter part of the 17th century until 1934.
 Its last occupant was musician Hugo Alfvén.
 Between 1743 and 1778, Carl Linnaeus resided in the building, and in 1937 it was re-made into a museum of Linnaeus personal and professional life.
 Furniture, household items and textiles, which belonged to the family, are exhibited together with Linnaeus personal medicinal cabinet, insect cabinet and herbarium.
The Anne Frank House (Dutch: "Anne Frank Huis" ) is a writer's house and biographical museum dedicated to Jewish wartime diarist Anne Frank.
 The building is located on a canal called the Prinsengracht, close to the Westerkerk, in central Amsterdam in the Netherlands.
The Gibran Museum, formerly the Monastery of Mar Sarkis, is a biographical museum in Bsharri, Lebanon, 120 km from Beirut.
 It is dedicated to the Lebanese writer, philosopher, and artist Kahlil Gibran.