"The lamps are going out all over Europe, we shall not see them lit again in our life-time", BritishForeign SecretarySir Edward Grey may have remarked on the eve of the declaration.
There has been a lot in the media on the lead up to the centenary of the first world war here in the UK.
Radio 4 has been doing a lot. I listened to this yesterday in one go.
It's interesting but not a broad sweep, confines itself to events in the drawing rooms, embassy rooms and cabinet offices across Europe.
Posted these links if it's of interest; the link in the second paragraph should let you in to the broadcasts.