Hem church is a medieval stone church, and is believed to be Vestfold's smallest of its kind with 90 seats.
The Gothic and the Roman period are both represented in the architecture of the church.
Her Majesty Queen Sonja showed appreciation for the church by writing a thesis on it during her studies. While working at the thesis, she visited the Lardal village and Hem church several times, and she was invited to the 600-year jubilee of the church in 1992.