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This History Extra podcast is brought to you by Guide Dogs.

This year marks the 95th anniversary of the first work in guide dog partnerships in the UK. And now, in the 21st century, the work of such animals is as important as ever.

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to embark on this journey too by sponsoring a guide dog puppy. The sponsor a puppy scheme is more

than a donation. You'll get updates, photos and videos, and most importantly, the pride of knowing

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forward slash puppy and be part of a story you'll be proud to share.

Thank you. slash puppy, and be part of a story you'll be proud to share. What's the role that sacrifice has played in the history of Christianity?

It's a history that might be more complex and more surprising than we think.

Jonathan Sheehan's latest book is On the Altar, a history of sacrifice from the

sacred to the secular. And in this episode of The History Extra podcast, he tells Charlotte Vosper

about how sacrifice is sat at the center of Christianity from its very beginnings.

Your book on the altar is about the history of sacrifice in Christianity, from the ancient world to the modern day.

...