Žatec gate, Medieval city gate in Louny, Czech Republic.

The Žatec Gate is a barbican built in 1500, a screen-like gate with a ground plan of 10.5 by 2.7 metres and a 4.5-metre-wide portal with a pointed arch. Its west facade carries three Latin inscriptions, a town coat of arms flanked by angels and the letter W for King Vladislav Jagiellon.

The present gate was built in 1500 as a barbican for the medieval Žatec Gate, which stood about 100 metres east in Žatecká Street and was demolished between 1744 and 1822. The barbican then took over the name. In 1842 the city builder Emilián Chládek replaced its roof with a neo-Gothic stone battlement.

The gate's name comes from the nearby town of Žatec, the destination of the road that passed through it. Its west facade carries three Latin inscriptions, including "O happy community that builds in times of peace", dated ANNO DOMINI MCCCCC. A statue of Saint Margaret with her dragon once stood on the gate, linked to annual festivities held in Louny in the 16th century.

The gate stands on Žatecká street at the western entrance to the old town, between the Church of St. Nicholas and the barbican itself. The surviving structure is only the outer foregate, 10.5 by 2.7 metres, so it is seen from the street rather than entered; the passage is a 4.5-metre-wide pointed-arch portal.

The gate's west facade carries three Latin inscriptions, including "O happy town that builds in times of peace", dated ANNO DOMINI MCCCCC. Between the lower cornices masons placed the letter W for King Vladislav Jagiellon, and until the 1780s a statue of Saint Margaret with her dragon stood on the gate.