Summarize this text about House of the Dragon?
House of the Dragon is an American fantasy drama television series created by George R. R. Martin and Ryan Condal for HBO. A prequel to Game of Thrones (2011–2019), it is the second television series in the A Song of Ice and Fire franchise. Condal and Miguel Sapochnik served as the showrunners for the first season. Based on Martin's 2018 novel Fire & Blood, the series is set about 100 years after the Seven Kingdoms are united by the Targaryen Conquest, nearly 200 years before the events of Game of Thrones, and 172 years before the birth of Daenerys Targaryen. Featuring an ensemble cast, the show portrays the events leading up to the beginning of the decline of House Targaryen, a devastating war of succession known as the "Dance of the Dragons".
House of the Dragon is a prequel to Game of Thrones. It is the second television series in the A Song of Ice and Fire franchise . Based on George R. R. Martin's 2018 novel Fire & Blood, the series is set about 100 years after the Seven Kingdoms are united by the Targaryen Conquest.