Lubomirski Ramparts (Polish: Okopy Lubomirskiego) was a 12 kilometre-long earthwork surrounding the city of Warsaw in late 18th and 19th century.
A line of earthworks with a dry moat separated the city of Warsaw from the countryside.
Erected by Stanisław Lubomirski, the then Grand Marshal of the Crown, in 1770, it was intended as a sanitary measure to stop plague epidemics ravaging Central Europe at that time.
In 1794 the ramparts were partially strengthened to include military keeps and played some role in the defence of Warsaw against a joint Russian and Prussian siege of the city in the summer of that year.
Around 1825 the president of Warsaw ordered the ramparts to be levelled and replaced with city streets.