What is Aachen Cathedral?
{{Infobox religious building | name = Aachen Cathedral | native_name = {{lang|de|Aachener Dom}} | image = Aachen Germany Imperial-Cathedral-01.jpg | image_upright = | alt = | caption = The Cathedral in 2014 | location = [[Aachen]], [[Germany]] | geo = {{coord|50|46|29.1|N|6|5|2.12|E|dim:500_region:DE-NW_type:landmark|display=it|name=Aachener Dom}} | province = [[Roman Catholic Diocese of Aachen|Diocese of Aachen]] | religious_affiliation = [[Roman Catholic]] | rite = | consecration_year = 805 | status = | functional_status = | heritage_designation = | leadership = | website = | architect = | architecture_type = [[Cathedral]] | architecture_style = [[Carolingian architecture|Carolingian]], [[Ottonian architecture|Ottonian]], [[Gothic architecture|Gothic]] | general_contractor = | facade_direction = | groundbreaking = 796 | year_completed = | construction_cost = | specifications = | capacity = | length = {{convert|73|m|ftin|abbr=on}} | width = {{convert|56|m|ftin|abbr=on}} | width_nave = | height_max = | dome_quantity = | dome_height_outer = | dome_height_inner = | dome_dia_outer = | dome_dia_inner = | spire_quantity = 1 | spire_height = {{convert|72|m|ftin|abbr=on}} | materials = | footnotes = {{Infobox UNESCO World Heritage Site |child = yes |ID = 3 |Year =1978 |Criteria = Cultural: i, ii, iv, vi |Area = 0.2 ha |Buffer_zone = 67 ha }} }} '''Aachen Cathedral''' ([[German language|German]]: ''Aachener Dom'') is a [[Roman Catholic]] [[church]] in [[Aachen]], [[Germany]]. It is one of the oldest [[cathedral]]s in [[Europe]]. [[Holy Roman Emperor|Emperor]] [[Charlemagne]] ordered for it to be built in 796.<ref name=EA>{{harvnb|Bayer|2000