"Her Majesty and His Royal Highness are visiting at the invitation of the President of the Federal Republic of Germany, Joachim Gauck."
The Queen stands next to German President Kohler in 2004
Mr Gauck, a human-rights campaigner, became president in March 2012 and was a guest at Buckingham Palace that November after being invited to lunch by the Queen. The Queen and Prince Philip mwill stay for three nights.
The British monarch has visited the European country seven times, with her last visit in 2004 with then-President Horst Kohler.
The 88-year-old Queen has showed no signs of slowing down, despite confirmation earlier in 2014 that she would begin to hand over more responsibilities to Princes Charles, William, and Harry.
The Queen's tweet gained almost 6,000 retweets in the first hour
In October 2014, the Queen also sent her first tweet, from her office's personal Twitter account, British Monarchy.