Figure 1.

Figure 2.

Vier Elemente der Baukunst original and English translation covers

Figure 3.

Excerpts from Semper’s Der Stil

Figure 4.

Postcard of Semper’s Dresden Opera House, 1837–41

Figure 5.

Zürich Polytechnikum, 1858–64

Figure 6.

Burgtheater, 1874–88. Ground floor

Figure 7.

Excerpts from Semper's Der Stil

Figure 8.

Burgtheater, 1874–88. Upper floor.