First,You must open the Photoshop software

Then. Open the image wich want to edit.

Click File-open-search the image

For example :

after that the image will appear.

Then Choose the menu Image-Adjusment-Desasture

the result will be

After that we give effect film grain

click Filter-filter gallery-film grain

for the setting

the Result wiil be

Picture becomes slightly rough texture

4. Now it was just the final touch that makes it seem ANCIENT
How: Main Menu select the Image - Adjustment - Hue / Saturation
Setting:

then it is the End result