100 Bitcoin currently works as a simple BTC/Sats to USD/EUR converter and provides Bitcoin price on current date for last 9 years.
As of yet, all data is fetched from CoinGecko.
You can expand it to the last 11 years by fetching the data from a source like "nomics [it has data starting from Aug/18/2011]" 
Note: I prefer to not vouch for its accuracy!