House Targaryen's sigil is a three-headed dragon breathing flames, red on black. The three-headed dragon representsthe Conqueror and his two sisters, Rhaenys and Visenya. Their house words are "Fire and Blood." Although the Targaryen kings took their seat at King's Landing, the place where Aegon and his army first landed in Westeros and made their first fort, Dragonstone remained the traditional seat of the heir-apparent to the throne, who was known as thePrince of Dragonstone. Younger siblings of the heir could receive Summerhall and be known as the Prince of Summerhall.
House Targaryen historically followed the gods of Valyria. Sometime before the conquest of the Seven Kingdoms, the Targaryens abandoned the Valyrian gods and converted to the Faith of the Seven, the predominant religion in Westeros. However, they continued to follow the Valyrian practice of incestuous marriage, wedding brother to sister, cousin to cousin, uncle to niece and aunt to nephew, holding themselves apart from and above the noble Westerosi families.
Deceased Targaryens are traditionally cremated.