errichten
to erect
To build or put up something large or important, especially buildings, monuments, or other structures.
Die Stadt plant, eine neue Brücke über den Fluss zu errichten.
The city plans to erect a new bridge over the river.

to erect / establish
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to erect
To build or put up something large or important, especially buildings, monuments, or other structures.
Die Stadt plant, eine neue Brücke über den Fluss zu errichten.
The city plans to erect a new bridge over the river.

'Errichten' (to erect / establish) is an inseparable verb. The prefix 'er-' remains firmly attached to the verb stem 'richten' in all tenses and sentence constructions.
Man errichtete das Monument im Zentrum der Stadt.
The monument was erected in the center of the city.
The word 'errichten' (to erect / establish) is formal and is used for large, important, or official construction projects and foundations. You would not use it for building a garden shed.
Die Firma wird auf dem Gelände einen neuen Hauptsitz errichten.
The company will erect a new headquarters on the site.
You can tell whether the concrete or abstract meaning is intended from the object. If it is a structure (building, monument), it is the concrete meaning. If it is a system (state, rule), it is the abstract meaning.
Ein Denkmal für die Opfer des Krieges wurde errichtet.
A monument to the victims of the war was erected.
In the meaning 'bauen' (to build), 'errichten' (to erect) is typically combined with large structures: 'ein Gebäude errichten' (to erect a building), 'ein Denkmal errichten' (to erect a monument), 'eine Mauer errichten' (to erect a wall), or 'eine Sperre errichten' (to put up a barrier).
An der Grenze wurde ein hoher Zaun errichtet.
A high fence was erected at the border.
to manage / create
'schaffen' and 'errichten' can both mean that something new comes into being. 'schaffen' is more general: you can create a work of art, an idea, a system of order, or new opportunities. 'errichten' is more concrete and fits especially with something large or solid, for example a building, a monument, or even an organization. 'errichten' often sounds more formal and has a stronger sense of building something up. When the meaning is creative production, 'schaffen' fits better. When something is built or officially established, 'errichten' is more precise.

Am Fluss errichtet die Stadt eine neue Brücke.
The city is building a new bridge by the river.
Die neue Leiterin schuf im Team eine ruhige Arbeitsatmosphäre.
The new manager created a calm working atmosphere in the team.