Britain's got thousands of years of history, but what does it mean to be British in 2012?
All week Nel is travelling around the country to work it out - and here is her second report.
She's looking into the history of our islands and our Royal Family with the help of Dan Snow, a history expert.
Throughout our history, Britain has been invaded, occupied by foreign armies and had loads of people coming and going.
And it's made Britain what it is today!