All remedies are still in use.. The first proved medicine was Cinchona By Dr Hahnemann.
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
Copper
Sanskrit
Sterling
remedy
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).
The fairy queen.
Battleship USS North Carolina