Win or Die
House Lannister of Casterly Rock
The Lannisters are an ancient house, descended from Andal adventurers and claiming descent through the female line from Lann the Clever, a legendary trickster of the Age of Heroes. They ruled as Kings of the Rock until the Field of Fire, where King Mern of the Reach died. The Westerlands are rich in gold, making the Lannisters the richest house in the Seven Kingdoms. Their motto is, “Hear Me Roar!”. House Lannister supported the crown during the Blackfyre Rebellion.
House Lannister was one of the guests invited to King Otto I's celebration of victory over House Blackfyre. It was on this night the Lannister's gift to the King, a lion, was released and attacked Lord Tyberian, severely wounding him.
After the celebration House Lannister was a major contributor to the Riverlands reconstruction efforts initiated by the Crown. Due to their significant investments and ability to organize relief for the people of the region, King Otto appointed Tyberian Lannister as Master of Coin and allowed the Westerlands to annex a portion of the now lordless Riverlands. This annexation included the former Tully home, Riverrun. Cestha Lannister would remain in Riverrun to rule as her father performed his duties in King's Landing.
Some months passed and the reconstruction of the Riverlands was going well. For his new subjects, Tyberian instituted a new holiday, "Day of Reconciliation", in which everyone in the region under his rule, would celebrate the prosperity and revitalization of the lands. House Lannister invited a number of lords from around Westeros to Riverrun where the family would graciously host the event. Tyberian's bastard, Tyrek Hill, was officially recognized by the Faith of the Seven and the Crown as the lord's right and legal heir to the Westerlands.