This document provides references to images of medieval castles to support an abstraction or summary. It lists 5 external links to photos of medieval cities and castles, including fortified walls, towers, and buildings within the walled cities. The images are intended to provide visual examples of aspects of medieval castle and city infrastructure that could be discussed or summarized.

1. ABSTRACCION
CASTILLOS MEDIEVALES
NATHALIA MENDOZA ARANGO
6120131028

2. ABSTRACCION

3. IMAGENES DE REFERENCIA
 http://iescavaleri.com/libro/userimages/d44e8603749c.gif

4. • http://3.bp.blogspot.com/_uD3_wntxoaE/S6t6qrkXNZI/AAAAAAAA
ASU/HXYXoanoUsU/s1600/ciudades.jpg

5.  http://2.bp.blogspot.com/_RzlA4jeAROQ/TO1-
5kL7YbI/AAAAAAAAAD0/gL137WehuuQ/s640/ciudad-medieval.jpg

6.  http://4.bp.blogspot.com/_FIhTIXf4s80/TTlr1JYMdvI/AAAAAAAAABY/7s8
mMmSecNo/s1600/20070717klphisuni_50.Ees.SCO.png

7.  http://historiaeuropa.files.wordpress.com/2012/06/ciudad-
medieval-4.jpg