On 6 October 1797, Frederica of Baden was married "per procura" to king Gustav IV Adolf of Sweden in Stralsund in Swedish Pomerania, with the Swedish negotiator baron Evert Taube as proxy for the monarch. She left her mother and her sister Maria, who had accompanied her to Swedish Pomerania, and was escorted by baron Taube by sea to Karlskrona in Sweden, where she was welcomed by the king. The entourage continued to Drottningholm Palace, where she was introduced to the members of the royal house and court. Finally, she made her official entrance in the capital, and the second wedding ceremony was conducted in the royal chapel on 31 October 1797. She was sixteen years old.