PHOTOS: 13 Famous Walls Around The World

Walls have been built since ancient times, to mark borders, protect kingdoms and settlements, or keep out unwanted people. In more recent times, walls have also been built to serve as memorials and structures of art.

Here are 13 walls from around the world, ancient and modern, and famous for their history, cultural or political significance.

Security Wall, West Bank

Free Derry Corner, Derry Ireland

<a href="http://www.huffingtonpost.com/social/Miriam_Kivlehan"><img style="float:left;padding-right:6px !important;" src="http://s.huffpost.com/images/profile/user_placeholder.gif" /></a><a href="http://www.huffingtonpost.com/social/Miriam_Kivlehan">Miriam Kivlehan</a>:<br />

Meandering Wall

<a href="http://www.huffingtonpost.com/social/Saint3"><img style="float:left;padding-right:6px !important;" src="http://s.huffpost.com/images/profile/user_placeholder.gif" /></a><a href="http://www.huffingtonpost.com/social/Saint3">Saint3</a>:<br />Seen at:  Storm King Art Center  1 Museum Road  New Windsor, NY  12553
Saint3:
Seen at: Storm King Art Center 1 Museum Road New Windsor, NY 12553

The Lennon Wall in Prague

<a href="http://www.huffingtonpost.com/social/misterb17"><img style="float:left;padding-right:6px !important;" src="http://s.huffpost.com/images/profile/user_placeholder.gif" /></a><a href="http://www.huffingtonpost.com/social/misterb17">misterb17</a>:<br />The Lennon Wall in Prague, Czech Republic
misterb17:
The Lennon Wall in Prague, Czech Republic

Mure Aureliane (Aurelian Walls) - Rome, Italy

<a href="http://www.huffingtonpost.com/social/ProudToBeVeryLiberal"><img style="float:left;padding-right:6px !important;" src="http://i.huffpost.com/profiles/502743-tiny.png?20101110014311" /></a><a href="http://www.huffingtonpost.com/social/ProudToBeVeryLiberal">ProudToBeVeryLiberal</a>:<br />The Aurelian Walls is a line of city walls built between 271 and 275 in Rome, Italy, during the reign of the Roman Emperors Aurelian and Probus.

Avila, Spain

<a href="http://www.huffingtonpost.com/social/Fercho"><img style="float:left;padding-right:6px !important;" src="http://s.huffpost.com/images/profile/user_placeholder.gif" /></a><a href="http://www.huffingtonpost.com/social/Fercho">Fercho</a>:<br />

This article originally appeared on HuffPost.