Vox 10th Anniversary Logo
Vox is a classic example of a company that cares deeply about brand consistency. And when you care about consistency, it can sometimes be either challenging or uneccessary to create an anniversary logo that adds in a bunch of new elements. So, Vox didn't. They took one of the existing brand fonts, made it nice and bold for a number 10, and placed their logo inside hugging the right line of the number 10. Clean, on-brand, effective.
Source:
https://www.vox.com/24160966/introducing-vox-next-chapter-10-years