Secretary of State John Kerry will visit Havana on August 14 to inaugurate the first United States embassy in Cuba in 54 years.

"On August 14, it will be my honor to raise the American flag at our Embassy in Havana, #Cuba for 1st time in 56 years. #USCuba," Kerry tweeted Monday afternoon, shortly after the Cuban government raised its flag in front of the old Cuban Interests Section in Washington, D.C.

The State Department also tweeted that the U.S. and Cuba had officially re-stablished diplomatic relations Wednesday, in accordance with President Obama's July 1 announcement.

The Cuban flag was also raised in the State Department lobby Monday alongside the flags of the other nations with which the U.S. has diplomatic relations.

Kerry spoke at the State Department with Cuba Foreign Minister Bruno Rodriguez Parrilla, who said he would welcome Kerry in his home country in a few weeks.