The ring wall seems to have been built separately from the main structure.

They seemed to have been built for the ages, but most did not last a generation.

Most of the installation did, indeed, seem to have been built into the ground.

Yet the entire structure seems to have been built to last for years.

The central heating system seems to have been built and used during her occupation only.

In fact, Athens almost seemed to have been built within a huge grove.

St. Martin's chapel seems to have been built in the early part of the 13th century.

As with those of Constantinople, the walls seem to have been built in the 4th century.

It seems to have been built in the late 9th or early 10th century.

This thing doesn't seem to have been built for travel.