Fortifications of Zürich

Zürich was an independent (''reichsfrei'') city or city-state from 1218 to 1798. The town was fortified with a city wall from the 13th to the 17th century, and with more elaborate ramparts constructed in the 17th to 18th century and mostly demolished in the 1830s to 1870s.

First wall

There had been a first city wall dating to the 11th or 12th century. The existence of such an early wall had been suggested, but the mainstream view assumed that the town had been unfortified – the remains of the Roman castle at the Vicus ''Turicum'', and a so-called Kaiserpfalz on Lindenhof hill excepted – before the 13th century, until the chance discovery of remnants of the first wall during the 1990s construction work at the central library respectively location of the Predigerkloster, the former Dominican abbey.

Second wall

Following the extinction of the main line of the Zähringer family in 1218, Zürich became a free imperial city. Over the following decades, a city wall was constructed over a length of some 2,400 m.

File:Edlibach Zürich.jpg, 1485 depiction of the 1444 siege of Zürich during the Old Zürich War (north is right)
File:Zurych Turicum.jpg, 1581 depiction of Zürich (north is left)
File:Keller Stadtplan Zürich 1504.jpg, 1904 map of Zürich in 1504
File:Hundert Jahre Bilder aus der Stadt Zürich - Vue d'une partie de Faubourg de la ville de Zurich pris du Rempart.jpg, Schanzengraben, Enge quarter, Zürichsee and Albis chain, as seen from the «zur Katz» ramparts (as of today the "old" Botanical Garden)
File:Stadtmauer ZB.jpg, Remains of the medieval city walls in a basement of Zentralbibliothek Zürich respectively at the location of today's Predigerkirche
File:Rennwegtor.jpg, The Rennweg gate in 1812
File:Oetenbachbollwerk vor 1903.jpg, The Oetenbach bulwark (built 1532) just before its demolition in 1903
File:Zürich - Neumarkt - Bilgeriturm IMG 1337.jpg, Bilgeri tower at Neumarkt
File:Brunnenturm.jpg, Brunnenturm (fountain tower) near Niederdorf
File:Zürich - Glentnerturm IMG 1960.jpg, Glentner tower at Limmatquai
File:Zürich - Grimmenturm IMG 2283.jpg, Grimmenturm at Neumarkt
File:Hardturm suedost.jpg, Hardturm next to the Limmat ( Industriequartier)
File:Zürich - Weinplatz - Haus zum Schwert IMG 1134.JPG, Mülnerturm or ''Schwert'' house at Weinplatz ( Rathausbrücke)
File:Zürich - Hirschengraben - Steinhaus Manesse & Meiss IMG 1275.jpg, Steinhaus at Hirschengraben

Early modern ramparts

The irrigated grave system of medieval Zürich, consisting of the internal (i.e. inside the town wall) '' Fröschengraben'', the outer ''Sihlgraben'' and the intermediate town wall was first mentioned in 1258 AD as ''niuwer graben'' (new moat); the present '' Schanzengraben'' was still in construction around 1300. Over the decades, the time accumulating sludge was periodically dug out by day laborers or in forced labor to process. Due to its former military defensive use, the moat has a widely octagonal ''zig-zag'' form, and was completed as part of the Baroque fortifications of Zürich around 1642 AD, and the '' Bollwerk zur Katz'' became the eastern gunnery bastion of the city fortification.

In the late Middle Ages, the present Sechseläutenplatz area was the location of the former military harbour of the city of Zürich respectively part of the so-called '' Stadelhoferbollwerk'' bastion on Zürichsee lakeshore. The former Stadelhofer bulwark also was built as part of the so-called ''fourth city fortifications'' in 1643 AD. The bastion was built partly into the lake, and in 1673 the Stadelhofen ravelin was attached, and completely broken in 1837/38.

The '' Oetenbachbollwerk'' was a bastion of the fortifications, and was built under the supervision of Balthasar Keller in 1532. The stronghold replaced a wooden mounting in the garden of the Oetenbach convent and had to secure the western town wall and the gate at the Limmat. In 1642 the bulwark was covered, and in 1764 the adjoining Waisenhaus building provided as a storage room and economics building. In 1903 the bastion was broken as the last construction of the city's fortifications. Numerous finds came to light, including the grave stone of ''Ulrich I von Regensberg'', which was misused as a loophole cornice of the bulwark.

From 1558 to 1562 the round ''Auf Dorf'' bastion with battlements was built at the site of the present Bellevueplatz at the junction of Limmatquai and ''Rämistrasse''. Structurally, it was connected to the ''Langenöhrlisturm'' of the city fortification, and originally surrounded almost entirely by the water of ''Zürichsee'' respectively ''Limmat''. The bulwark comprised casemates with loopholes and a platform for the artillery to defend against attackers on the lake, and to complete the opposite Bauschänzli bastion respectively the medieval Grendeltor. The remains were discovered on occasion of road works in March 2015.

From 1642, an impressive set of ramparts was built based on plans by Hans Georg Werdmüller and Johann Ardüser, at an immense cost and completed only in the second half of the 18th century. The ramparts included fifteen bastions, one of them built inside the Limmat (the ''Bauschänzli'', location of the former ''Ravelin Kratz'').

The ramparts were mostly destroyed in 1834, but parts of the walls and the western moat remain visible.

File:Müllerplan 1793.jpg, 1793 map of Zürich (north is left), the so-called ''Müllerplan''
File:Zürich - Alter Botanischer Garten IMG 0790.JPG, The moat ('' Schanzengraben'') and the remains of the Bollwerk zur Katz ( Old Botanical Garden), next to Selnau station.
File:Schanzen Paradeplatz 18Jh.jpg, 18th century sketch of the old and new walls on either side of Paradeplatz (at the time known as ''Neuer Markt'').
File:Schanzen beim Stadelhoferbollwerk - 2014 Sechseläutenplatz-'fäscht' 2014 2014-04-26 18-22-22 (P7700).JPG, ''Stadelhoferbastion'' and former ''war'' harbour at, as of today, Sechseläutenplatz and Stadelhoferplatz

References

External links

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