It may have been built on top of an earlier structure.

They had built their main city on top of the peaks.

Each time, the new cities were built directly on top of the old ones.

The tower would have been built on top of the 1957 structure.

In some places, new town quarters are built on top of old ones.

John and Paul is built on top of the house in which the saints lived.

Some are built on top of a standard door closer.

Countries with new technology built on top of an older one had managed the best.

"But that is because something has been built on top of it," he said.

In 1866 they had a larger home built on top of the hill.