who created the first piece mentioned above?
It was made nder the supervision of the architect and sculptor Phidias and his assistants.
Elgin Marbles
The Parthenon Marbles (Greek: Γλυπτά του Παρθενώνα), also known as the Elgin Marbles (), are a collection of Classical Greek marble sculptures made under the supervision of the architect and sculptor Phidias and his assistants. 
what is royal gold cup? It is a solid gold covered cup lavishly decorated with enamel and pearls. is it kept in a museum? Yes, in the British Museum who designed it? John, Duke of Berry was there someone from the royal family or anyone who utilized this piece? Charles VI of France will you find pictures of human figures in that object? Yes, symbols of the Four Evangelists run round the foot of the cup. with reference to that institution where this object is kept, when was that institution established? 1753 name some precious pieces you will find in this institution. The Elgin Marbles, Benin Bronzes, Ethiopian Tabots and the Rosetta Stone
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Elgin Marbles [SEP] Introduction
The Parthenon Marbles (Greek: Γλυπτά του Παρθενώνα), also known as the Elgin Marbles (), are a collection of Classical Greek marble sculptures made under the supervision of the architect and sculptor Phidias and his assistants. They were originally part of the temple of the Parthenon and other buildings on the Acropolis of Athens. The collection is now on display in the British Museum, in the purpose-built Duveen Gallery. From 1801 to 1812, agents of Thomas Bruce, 7th Earl of Elgin removed about half of the surviving sculptures of the Parthenon, as well as sculptures from the Propylaea and Erechtheum. The Marbles were transported by sea to Britain.