Identifying antique paintings can be challenging because age alone does not confirm authenticity. Several details can help when examining an old artwork.
First, look at the materials and painting technique. The type of canvas, wood panel, pigments, and brushwork may provide clues about when the artwork was created. The artist’s signature can also be useful, but it should be researched carefully because signatures can sometimes be added or altered later.
The frame can offer additional information. Its construction, materials, carving style, and signs of aging may help establish whether it is from the same period as the painting. However, frames are often replaced, so they should not be used as the only evidence.