Hull's Beverley Gate granted government protection
Hull's ancient defence walls have been granted protection by the government.
The Beverley Gate was where King Charles I was refused entry to Hull in 1642, sparking the English Civil War.
The Department for Culture, Media and Sport said protecting the remains would preserve them "for years to come".
Last year, Hull City Council wanted to cover up the site with trees and a lawn for its City of Culture 2017 plans but ruled it out after a campaign against the idea.
Historic England said it had advised the government to protect the remains because of the "national importance of Hull's 14th century town walls".
In a public survey last month, people voted for the site to remain open and redeveloped with amphitheatre-style seating and glass fencing to replace the existing rails.
The local authority said it would submit a planning application in the spring.