Hamburg - City with most churches 100 m/328 ft in the world
 

St. Nicholas' Church (483 ft)
https://upload.wikimedia.org/wikiped...r_DSCF7725.jpg
Foto: Martina Nolte / Lizenz: Creative Commons CC-by-sa-3.0 de

St. Peter's Church (436 ft)
https://upload.wikimedia.org/wikiped..._-IMG-1418.jpg
Foto: Thomas Fries / Lizenz: cc-by-sa-3.0 de

St. Michael's Church (433 ft)
https://upload.wikimedia.org/wikiped....2.phb.ajb.jpg
Bild: © Ajepbah / Wikimedia Commons / Lizenz: CC-BY-SA-3.0 DE

St. James' Church/St. Jacobi (410 ft)
https://upload.wikimedia.org/wikiped..._-IMG-1437.jpg
Foto: Thomas Fries / Lizenz: cc-by-sa-3.0 de

St. Catherine's Church (377 ft)
https://upload.wikimedia.org/wikiped..._-IMG-1407.jpg
Foto: Thomas Fries / Lizenz: cc-by-sa-3.0 de

I like this one, when was it built?

The original history of the church building dates back to the period between 1350 and 1400.
After its destruction in World War II, the present tower was redesigned by the architects Hopp & Jäger in 1963.

Source: St. James' Church, Hamburg

Cologne Cathedral (516 ft)
 

https://upload.wikimedia.org/wikiped...%BCst-0968.jpg
© Raimond Spekking / CC BY-SA 4.0 (via Wikimedia Commons)

https://upload.wikimedia.org/wikiped...le_vue_sud.jpg
by User:Velvet, Wikimedia Commons CC BY-SA 4.0 DEED

https://upload.wikimedia.org/wikiped...-K%C3%B6ln.jpg
source: Wirginiusz Kaleta, Wikimedia Commons CC BY-SA 3.0 DE DEED

https://live.staticflickr.com/4117/4...4fa83056_b.jpg
Flight over Cologne by Neuwieser, auf Flickr

Ulm Minster (530 ft)
 

https://upload.wikimedia.org/wikiped...North-2010.jpg
by Jürgen Kehrberger, https://www.panoramio.com/photo/38433265 (CC BY-SA 3.0 DEED)

https://upload.wikimedia.org/wikiped...40719-1446.jpg
by User:Karle3, Wikimedia Commons CC BY-SA 3.0 DE DEED

https://upload.wikimedia.org/wikiped...nster-0160.jpg
Deusche Dome, herausgegeben durch Verlags Karl Robert Langewiesche in der Serie '"Blauen Bücher" CC BY-SA 4.0 DEED

Frauenkirche, Dresden
 

https://live.staticflickr.com/398/31...315e1e1d_b.jpg
Dresden - Frauenkirche by Michael Kemper, auf Flickr

My own photos.
https://live.staticflickr.com/65535/...b6e44d4a_b.jpg
P1020118 by Klaus Kühnast, auf Flickr

https://live.staticflickr.com/65535/...14678f9d_b.jpg
P1020090 by Klaus Kühnast, auf Flickr

https://live.staticflickr.com/65535/...b248395c_b.jpg
P1020094 by Klaus Kühnast, auf Flickr

https://live.staticflickr.com/65535/...70328d28_b.jpg
P1020092 by Klaus Kühnast, auf Flickr

Milan Cathedral
 

https://upload.wikimedia.org/wikiped..._del_Duomo.jpg
by Jiuguang Wang, Wikimedia Commons (CC BY-SA 3.0 DEED)

https://upload.wikimedia.org/wikiped..._panoramio.jpg
www.panoramio.com (CC BY-SA 3.0 DEED)

https://upload.wikimedia.org/wikiped...ieur_-_Nef.jpg
Jean-Christophe BENOIST, Wikimedia Commons (CC BY 3.0 DEED)

Basilica of San Gaudenzio, Novara (Italy)
 

https://upload.wikimedia.org/wikiped..._Gaudenzio.jpg
by Umby, Wikimedia Commons (CC BY-SA 3.0 DEED)

https://upload.wikimedia.org/wikiped..._Gaudenzio.jpg
by Marco Del Torchio, Wikimedia Commons (CC0 1.0 DEED)

https://upload.wikimedia.org/wikiped..._interno13.jpg
User:Awd, Wikimedia Commons (CC BY-SA 3.0 DEED)

The fully realized Cathedral of St. John the Divine in Upper Manhattan would be a sight to behold if ever completed - which do to funding and very real engineering and soil suitability concerns likely never will be:

https://www.mediastorehouse.com/p/61...rd-9777925.jpg
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The Baha'i Temple in the Chicago North Shore town of Wilmette, IL is very impressive:

https://www.bahaiblog.net/wp-content...ne-footage.jpg
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https://a.travel-assets.com/findyour...Of-Worship.jpg
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Florence Cathedral
 

https://live.staticflickr.com/5497/9...b33b9fde_b.jpg
Grand Duomo by Bruce Stokes, auf Flickr

Basilica of the Sacred Heart, University of Notre Dame, South Bend, Indiana, USA
230 feet (70 m)

https://photos.nd.edu/img-get/I00009...ca-Moonset.jpg

https://www.wishtv.com/wp-content/up...Notre-Dame.jpg


https://conradschmitt.com/wp-content...018/03/158.jpg

https://pbs.twimg.com/media/F9YAWBfW0AAut62?format=jpg

Aachen Cathedral
 

https://live.staticflickr.com/65535/...c2a11ed2_b.jpg
Aachener Dom by Sander Sloots, auf Flickr

https://live.staticflickr.com/65535/...cab0f617_b.jpg
Aachener Dom by Alan Parker Photos, auf Flickr

https://live.staticflickr.com/65535/...0e21a6c4_b.jpg
Aachener Dom by Werner Hofmann, auf Flickr

https://live.staticflickr.com/1496/2...7bc631db_b.jpg
Aachener Dom by Markus Lindner, auf Flickr

Sankt Antonius Basilika (Rheine)
 

https://upload.wikimedia.org/wikiped...8Rheine%29.jpg
by User:Sharps, Wikimedia Commons (CC BY-SA 2.0 DE DEED)

https://upload.wikimedia.org/wikiped...ika_Rheine.jpg
by User:Tubantia, Wikimedia Commons (CC BY-SA 3.0 DEED)

Paderborn Cathedral

https://upload.wikimedia.org/wikiped...rner_Dom_1.jpg
by User:Zefram, Wikimedia Commons (CC BY-SA 3.0 DEED)

Marktkirche, Wiesbaden
 

https://live.staticflickr.com/65535/...3a725e41_b.jpg
Marktkirche Wiesbaden by Bildsensor, auf Flickr

https://live.staticflickr.com/65535/...6e0e81a7_b.jpg
Marktkirche, Wiesbaden, Rheingau, Nassau, Germany by Billy Wilson, auf Flickr

https://live.staticflickr.com/6095/6...6d9becc8_b.jpg
Marktkirche, Wiesbaden, Germany by Jochen Hertweck, auf Flickr

Berlin Cathedral
 

source: Wikipedia

https://upload.wikimedia.org/wikiped...sade_--_04.jpg
User:Chainwit., Wikimedia Commons (CC BY 4.0 DEED)

https://upload.wikimedia.org/wikiped...ke_um_1900.png
public domain

https://upload.wikimedia.org/wikiped...ke_um_1900.png
public domain