In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

The future Byzantine Emporer Romanus II was at one time betrothed to his niece Hedwig, and his son married Theophano, who was either the daughter of the same Romanus II or the niece of John Tzimices. The son of Henry I, Duke of Saxony, he defeated the Magyars at the Battle of Lech in 955 and was crowned Holy Roman Emperor in 962. For ten points, name this founder of the dynasty that bears his name.
History

Notably, one of these entities is absent in the Leishmania mexicana GPI8 protein, and abnormally low numbers of pericytes occur if one is missing from PDGF. Binding of 14-3-3 proteins to GABAB ["Gabba-sub-bee"] receptors does not occur when two arginines are mutated to alanine in one of these entities, which also binds to the COPI complex. They are usually C-terminal signals, and a common mammalian one consists of the amino acids lysine, aspartate, gluatamate, and leucine, or KDEL. hnRNP C proteins contain one of them that allows them to override nuclear export signals. For 10 points, name these signals important in directing proteins to the correct membranes, most often used to prevent a protein's export from the endoplasmic reticulum.
Science

This artist's studio was redesigned to resemble a kiva for one work in which he depicted the central figure holding a war mace in his right hand, while contemplating another object in his left, a portrait of Frank Hamilton Cushing. Three nude youths lounge in the grass, two playing syrinxes in this artist's Arcadia, and a youth carries a bloody sponge in a bucket as he stands behind an illuminated figure, wearing only white briefs and waving to the crowd in this artist's Salutat. In another work, a nude (*) youth stands with his back to the viewer, watching as a friend dives into the titular location, while another work features the artist rowing alone in a boat to the right of the title figure. This artist of The Swimming Hole and Max Schmitt in a Single Scull also painted a man with a bloody hand and scalpel staring away from the surgery being performed to his left. FTP, name this naked young boy enthusiast who painted The Gross Clinic.
Fine Arts