Question: What was the function of the Pantheon in the birthplace of the father of John XI?

<P0-S0> She was the mother of Marozia, alleged concubine to Pope Sergius III, and the mother of Pope John XI, fathered by—according to Liutprand of Cremona and the "Liber Pontificalis"— Sergius. <P0-S1> A third contemporary source, however—the annalist Flodoard (c. 894–966)—says John XI was the brother of Count Alberic II of Spoleto, the latter being the offspring of Marozia and her husband Count Alberic I of Spoleto. <P0-S2> Hence John too was probably the son of Marozia and Alberic I. <SEP> <P1-S0> The Pantheon (/ ˈpænθiən / or US: / ˈpænθiɒn /; Latin: Pantheum, from Greek Πάνθειον Pantheion, ``(temple) of all the gods '') is a former Roman temple, now a church, in Rome, Italy, on the site of an earlier temple commissioned by Marcus Agrippa during the reign of Augustus (27 BC -- 14 AD). <P1-S1> The present building was completed by the emperor Hadrian and probably dedicated about 126 AD. <P1-S2> He retained Agrippa's original inscription, which has caused confusion over its date of construction as the original Pantheon burned down, so it is not certain when the present one was built. <SEP> <P2-S0> Edward Gibbon wrote of her that the "influence of two sister prostitutes, Marozia and Theodora was founded on their wealth and beauty, their political and amorous intrigues: the most strenuous of their lovers were rewarded with the Roman tiara, and their reign may have suggested to darker ages the fable of a female pope. <P2-S1> The bastard son, two grandsons, two great grandsons, and one great great grandson of Marozia—a rare genealogy—were seated in the Chair of St. <P2-S2> Peter." <P2-S3> Pope John XIII was her nephew, the offspring of her younger sister Theodora. <P2-S4> From this description, the term "pornocracy" has become associated with the effective rule in Rome of Theodora and her daughter Marozia through male surrogates. <SEP> <P3-S0> giulio tadolini (1849–1918) was an academic-trained italian sculptor, who was born and died in rome, where he passed his career in the family atelier, which he inherited from his father scipione tadolini (1822–92), who in turn was the son of adamo tadolini, antonio canova's favourite apprentice. <P3-S1> aside from his numerous portrait busts and memorial sculpture for private persons, he executed sculpture for three famous public monuments, the monument to victor emmanuel ii in perugia (1890) and for the funeral monuments of umberto i of italy (1900, pantheon), and of pope leo xiii (1907, st john lateran, "illustration"), in which baroque conventions of gesture and iconography in polychome and white marbles are combined with theatrical realism and bravura renditions of the textures of flesh and textiles. <SEP> <P4-S0> prince john of the united kingdom (john charles francis; 12 july 1905 – 18 january 1919) was the fifth son and youngest of the six children born to king george v and his wife, queen mary. <P4-S1> at the time of john's birth, his father was the prince of wales and heir apparent to the reigning monarch of the united kingdom, king edward vii. <P4-S2> in 1910, george succeeded to the throne upon edward's death and john became fifth in the line of succession to the british throne.