This is a large reproduction print of a Nicolas De Corsi (Odessa 1882 - Napoli 1956)
and represents the arches of Rome.
This is clearly a nice copy piece broken into four parts
called a polyptych in art terms, done by a publishing company in the 1960-1980 time period.
The publisher or a set of catalog numbers are most likely on the back.
The value of this work as a whole is in the range of $60 to $75.00.
Some sites that I recommend for selling are Varagesale.com, Ioffer.com, OfferUp.com, Ebay and letgo.com.You can also go to invaluable.com or liveauctioneers.com and search their directory for an auction house near you and consign to them.
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