 KRESBY A FOTOGRAFIE:  www.romaoltrelemura.it, http://en.wikipedie.org, http://fr.wikipedie.org, http://de.wikipedie.org, www.mlahanas.de, http://chestofbook.com, http://static.panoramio.com, http://romanes.com, http://architektur.relig.free.fr, www.jorgetutor.com, www.eupedia.com www.visualtravelguide.org, www.digifotomag.cz, www.czecot.com, www.hrady.cz www.javurkova.com,, www.arch.mcgill.ca, http://rubens.anu.edu.au