The central structure of ancient cities is completely uneven and doesn't match any branching structure. The central portal is even and the rest is not only not even, but they're not aligned with each other.

Main passages

Firstly, the Warden head is not centered in the main structure (see yellow lines and blue markings). The frontal passage is centered on the middle of the castle aligned with the chest (see green line).

Figure 1. Frontal view of the castle

Figure 2. Offcentered marking of the portal

However, the back passage is not aligned neither with any of the centers of the portal nor the front passage (see red line).

Figure 3. Back view of the portal, green line center of the front passage, red line center of the back passage.

Side passages

Also, the castle is even in the lateral dimension (see pink line). This leads to having offcentered side passages.

Figure 4. Right view of the castle, pink line width of castle, orange line center of right passage

Furthermore, the side passages do not align with each other, the left aligns with the chest (see purple line) and the right misses by one block (see orange line)

Figure 5. Top view alignment of the sides

Figure 6. Left view of the castle, purple line center of left passage, orange line center of right passage