Alberico was born in the
castle of
San Zenone to
Ezzelino II da Romano and Adelaide Alberti di Mangona. He was a brother of
Ezzelino III and
Cunizza. He married twice. From his first marriage to a noblewoman from
Vicenza named Beatrice, he had one daughter, Adelaide, who married Rinaldo d'Este in 1235, and five sons: Ezzelino, killed in battle in 1243; Alberico; Romano; Ugolino; and Giovanni. From his second marriage to Margherita he had three daughters: Griselda, Tornalisce, and Amabilia. Politically allied with his brother Ezzelino, Alberico served as
podestà of Vicenza on behalf of the
Emperor Frederick II in 1227. In 1239 he became detached from the Ghibelline faction and allied with the Guelph
Guecellone da Camino. That same year he aided the
Milanese against the emperor. In 1240, as a Guelph, he conquered
Treviso and became its
podestà, governing it as a Ghibelline until 1257.
Pope Alexander IV excommunicated him and, in 1259, on the death of his brother following the
Battle of Cassano d'Adda, he was chased from the city of Treviso and took refuge in the castle of San Zenone with most of his family. On 25 August 1260 the Guelph troops of
Venice,
Trento,
Padua, and Vicenza invested San Zenone. Completely circled and with no possibility of mounting a defence, Alberico surrendered in the hopes of saving his and his relatives' lives. The hatred his brother had incurred, however, was too great. The following day his sons, some still young children, were chopped to pieces before his eyes while he languished in chains. His female relatives were paraded naked through the streets and then burned alive. Alberico, having been forced to assist in their execution, was then tortured with hot irons, tied to the tail of a horse, and dragged through the streets of Treviso until dead. The chronicler
Salimbene de Adam recorded that "
Vidi ista oculis meis" ("I saw this with my own eyes"). ==Poetry==