
erbauen
to build
To build or construct something large or impressive, often in a historical or architectural context.
Die Kathedrale wurde im 12. Jahrhundert erbaut.
The cathedral was built in the 12th century.
to build / edify
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to build
To build or construct something large or impressive, often in a historical or architectural context.
Die Kathedrale wurde im 12. Jahrhundert erbaut.
The cathedral was built in the 12th century.

to edify
To influence someone intellectually or spiritually in a positive way, often through art, music, or a sermon.
Seine Rede hat die Zuhörer sichtlich erbaut.
His speech visibly edified the listeners.

to be pleased
Often used ironically to express pleasure or approval about something that one actually disapproves of or finds bad.
Der Chef zeigte sich wenig erbaut von unserem Vorschlag.
The boss was not exactly pleased with our proposal.
The prefix 'er-' is inseparable and always remains attached to the verb 'bauen' (to build). It often emphasizes the successful completion or creation of something large.
Man erbaute die Brücke in nur zwei Jahren.
They built the bridge in just two years.
If the object is a building, 'erbauen' (to build) means 'errichten' (to construct). If the object is a person, it is about spiritual elevation. You can recognize the ironic expression by the form 'sich (wenig) erbaut zeigen' (to show oneself to be not very pleased).
Die Stadt erbaute ein neues Rathaus.
The city built a new town hall.
In the meanings 'errichten' (to construct) and 'geistig erheben' (to spiritually uplift), 'erbauen' (to build/edify) belongs to elevated language. The ironic expression 'sich nicht erbaut zeigen' (to not be pleased), however, is also common in colloquial language.
Die antiken Tempel wurden zu Ehren der Götter erbaut.
The ancient temples were built in honor of the gods.
In the meaning 'errichten' (to construct), 'erbauen' (to build) is very often used in the passive to describe when or by whom a building was built. The focus is on the structure itself.
Dieses Schloss wurde vor über 300 Jahren erbaut.
This castle was built over 300 years ago.
The expression 'sich erbaut zeigen' (to show oneself pleased) is reflexive. To express displeasure, it is almost always negated or softened, e.g. 'sich nicht erbaut zeigen' (to not be pleased) or 'sich wenig erbaut zeigen' (to be not very pleased).
Meine Mutter zeigte sich wenig erbaut von meinen schlechten Noten.
My mother was not very pleased with my bad grades.
to build
Bauen is the neutral verb for erecting buildings and other structures. Erbauen is used especially for large or impressive structures and often sounds elevated or historical. In a factual everyday statement, bauen is usually more appropriate.

Das prächtige Konzerthaus wurde im Jahr 1890 erbaut.
The magnificent concert hall was built in 1890.
Die Stadt baut ein neues Konzerthaus.
The city is building a new concert hall.