Katedra w Akwizgranie (Polish Wikipedia)

Aachen Cathedral [online], Encyclopedia of Medieval Pilgrimage [dostęp 2023-03-11] .
AleksandarA. Zlateski AleksandarA., VeronikaV. Shendova VeronikaV., Harmonization of seismic vulnerability assessment of urban historic centers, University of Zagreb Faculty of Civil Engineering 1st Croatian Conference on Earthquake Engineering, 22 marca 2021, DOI: 10.5592/co/1crocee.2021.150 [dostęp 2023-03-11] .

kenyon.edu (Global: 8,981^st place; Polish: low place)

digital.kenyon.edu

HannekeH. Asperen HannekeH., Annunciation and Dedication on Aachen Pilgrim Badges. Notes on the Early Badge Production in Aachen and Some New Attributions, „Peregrinations: Journal of Medieval Art and Architecture”, 4 (2), 2013, s. 215–235, ISSN 1554-8678 [dostęp 2023-03-10] .

pielgrzymki.org.pl (Global: low place; Polish: low place)

Akwizgran. (pol.).

po-niemczech.blogspot.de (Global: low place; Polish: low place)

Świecznik Barbarossy. [dostęp 2013-04-07]. (pol.).

polonia-viva.eu (Global: low place; Polish: low place)

Karol Wielki i jego Akwizgran - résumé z okazji 1200 rocznicy śmierci „ojca Europy”. www.polonia-viva.eu. [dostęp 2014-02-19].

researchgate.net (Global: 120^th place; Polish: 180^th place)

C.M.C.M. Hüls C.M.C.M., P.M.P.M. Grootes P.M.P.M., M.-J.M.J. Nadeau M.-J.M.J., RADIOCARBON MEASUREMENTS OF IRON GIRDERS FROM AACHEN CATHEDRAL [online], 2011 (ang.).

umk.pl (Global: 7,071^st place; Polish: 166^th place)

kolomedievi.umk.pl

Ambona Henryka II. (pol.).
Relikwiarz Karola Wielkiego (Karlsschrein). (pol.).

unesco.org (Global: 104^th place; Polish: 42^nd place)

whc.unesco.org

Oficjalna nazwa wpisana na listę UNESCO
Oficjalny podział dokonany przez UNESCO
UNESCO World HeritageU.W.H. Centre UNESCO World HeritageU.W.H., Aachen Cathedral [online], UNESCO World Heritage Centre [dostęp 2023-03-11] (ang.).
UNESCO World HeritageU.W.H. Centre UNESCO World HeritageU.W.H., UNESCO World Heritage Centre - World Heritage List [online], UNESCO World Heritage Centre [dostęp 2023-03-10] (ang.).

worldcat.org (Global: 5^th place; Polish: 2^nd place)

HannekeH. Asperen HannekeH., Annunciation and Dedication on Aachen Pilgrim Badges. Notes on the Early Badge Production in Aachen and Some New Attributions, „Peregrinations: Journal of Medieval Art and Architecture”, 4 (2), 2013, s. 215–235, ISSN 1554-8678 [dostęp 2023-03-10] .
EricE. Rice EricE., Two Liturgical Responses to the Protestant Reformation at the Collegiate Church of Saint Mary in Aachen, 1570–1580, „Viator”, 38 (2), 2007, s. 291, DOI: 10.1484/J.VIATOR.2.302533, ISSN 0083-5897 [dostęp 2023-03-11] (ang.).

Katedra w Akwizgranie (Polish Wikipedia)

aachenerdom.de (Global: low place; Polish: low place)

brepolsonline.net (Global: low place; Polish: low place)

brill.com (Global: 1,840th place; Polish: 1,926th place)

doi.org (Global: 2nd place; Polish: 6th place)

dx.doi.org

heiligtumsfahrt-aachen.de (Global: low place; Polish: low place)

hungarytoday.hu (Global: low place; Polish: 7,419th place)

iitk.ac.in (Global: 6,454th place; Polish: low place)

kenyon.edu (Global: 8,981st place; Polish: low place)

digital.kenyon.edu

pielgrzymki.org.pl (Global: low place; Polish: low place)

po-niemczech.blogspot.de (Global: low place; Polish: low place)

polonia-viva.eu (Global: low place; Polish: low place)

researchgate.net (Global: 120th place; Polish: 180th place)

umk.pl (Global: 7,071st place; Polish: 166th place)

kolomedievi.umk.pl

unesco.org (Global: 104th place; Polish: 42nd place)

whc.unesco.org

worldcat.org (Global: 5th place; Polish: 2nd place)

brill.com (Global: 1,840^th place; Polish: 1,926^th place)

doi.org (Global: 2^nd place; Polish: 6^th place)

hungarytoday.hu (Global: low place; Polish: 7,419^th place)

iitk.ac.in (Global: 6,454^th place; Polish: low place)

kenyon.edu (Global: 8,981^st place; Polish: low place)

researchgate.net (Global: 120^th place; Polish: 180^th place)

umk.pl (Global: 7,071^st place; Polish: 166^th place)

unesco.org (Global: 104^th place; Polish: 42^nd place)

worldcat.org (Global: 5^th place; Polish: 2^nd place)