Whose execution in 1649 marked the temporary abolition of the English monarchy?

King Charles I

Who starred as Michael Scott in the U.S. version of "The Office"? What famous landmark hosts the lighting of its iconic Christmas tree closely after Thanksgiving? "Just Friends" starred which actor as Chris Brander, who returns home at Christmas? What naturally occurring geologic formation ejects heated water and steam periodically? What do you call a triangle with three unequal sides?