text: This king may have been complicit in the disappearance of Philip Christoph von Konigsmarck, the lover of his first wife, whom he locked up in the Castle of Ahlden.
full_question: This king may have been complicit in the disappearance of Philip Christoph von Konigsmarck, the lover of his first wife, whom he locked up in the Castle of Ahlden. The Whigs cemented their power during this man's reign by passing the Septennial Act. During this king's reign, the Battle of Preston went poorly for Lord Mar, who attempted to place the Old Pretender on the throne during the first of the (*) Jacobite Uprisings, the Fifteen. This king, who lost some of his own money in the South Sea Bubble and was advised by Robert Walpole, was slated to succeed his mother Sophia as per the Act of Settlement, but ended up ascending to the throne directly after the death of Queen Anne. For 10 points, name this first British monarch from the German House of Hanover.
first_sentence: This king may have been complicit in the disappearance of Philip Christoph von Konigsmarck, the lover of his first wife, whom he locked up in the Castle of Ahlden.
raw_answer: George I [or George Louis I or Georg Ludwig I; prompt on George] 