Battleship USS North Carolina
It is the oldest NATIONAL flag still in use - it is not the oldest flag.
sanskrit is the oldest language and it is still in use in HINDI rituals
The US battleship Pennsylvania is resting on the bottom of the Pacific Ocean. Her sister, the USS Arizona is resting on the bottom of Pearl harbor. The oldest US battleship still afloat is the USS Texas. Her sister, the USS New York is also resting on the bottom of the Pacific Ocean. The only pre-dreadnaught remaining in the world, is the IJN Mikasa; which is preserved in Japan as a memorial.
Sanskrit
Copper
Sterling
tye
Lambeau Field
The Dutch tricolour flag is the oldest tricolour flag still in use.
The world's oldest currency still in use is Pound Sterling (The currency of the United Kingdom).
All remedies are still in use.. The first proved medicine was Cinchona By Dr Hahnemann.
The fairy queen.