European Bond: Suggested source for historical data

English
1

Hi
I have some problem to find an effective free source for hystorical data for some european bonds (maily from italy/france/german) can you share your best source ?

2

How shall we help when you keep the specific bonds a secret?

3

Thanks
this is an example FR0013451507.
in general i use investing.com but it seems not always updated (https://de.c/rates-bonds/fr0013451507-historical-data). this is an example and the reason why i kindly ask if there are some suggested sources where finding european bonds quotation. thanks

4

For instance: Xetra: