The drawings will be further studied by a group of experts as the painting undergoes restoration.

This is partly due to the result of a variety of conservation treatments the painting has undergone.

In 2005-2006, the painting underwent a massive restoration as part of Forest Lawn's centennial celebration.

The painting has undergone severe damage since it was first "discovered" in the early 20th century.

Masłowski's painting underwent profound changes during this period.

The painting had already undergone alterations centuries ago.

The painting has undergone various cleaning, repair, and restoration treatments.

The painting has undergone various cleaning, revarnishing, repair, and restoration treatments since its installation.

The painting underwent several restorations and repainting, most of which was cleared recently by the Louvre.

Jay Milder's paintings have undergone various stylistic changes since the 1950s.