He presented his work in many personal exhibitions in Greece (Athens, Thessaloniki, Larissa, Heraklion, etc.) and abroad (New York, Paris, Venice, Florence, Munich, Nicosia, etc.).

 

He participated in many international group exhibitions and Biennale: Alexandria (1955), Lugano (1958), São Paulo (1959), Tokyo (1959), Ljubljana (1965), Venice (1968), Florence (1972), Stuttgart (1978), etc.

 

His works are in many private collections in Greece and abroad and at least 20 museums and galleries around the world. His works are exhibited, among others, in the following collections:

- The Hamburg Museum - Germany,

- The Philadelphia Museum of Art - USA,

- The New York Public Library Gallery - USA,

- The University of Minnesota - USA, La Salle University - USA,

- The Nelson Rockefeller Collection - New York, USA,

- The Tucson School – Arizona, USA,

- The Cooper A+M Records Collection - Los Angeles, USA,

- The MJ Spiegel Collection – Chicago, USA,

- The Piccadilly Circus Gallery – London, UK,

- The Ben Nicholson London Gallery - UK,

- The Royal Museum of Military History in Brussels, Belgium,

- The Ford Collection – Venice, Italy,

- The National Gallery of Greece,

- The Ministry of Culture of Greece,

- The Pierridis Collection - Greece,

- The Vorres Museum - Greece,

- The Ministry of Education of Cyprus, etc.

 

In 1994, the National Gallery of Greece honored Constantinos Grammatopoulos with an outstanding month-long retrospective exhibition.

In 2007, his work was exhibited in The Municipal Gallery of Thessaloniki.

In 2014, the “B. & M. Theocharakis Foundation for the Fine Arts” honored Constantinos Grammatopoulos with an outstanding month-long retrospective exhibition.