For a diplomat speeches and lectures are your bread and butter. You do a lot of them, mainly on occasions of social events, jubilees or meetings. Most of the speeches are superficial, light-weight or just introductions for more important speakers. This is no criticism. Most speeches are not held to be heard, but to give a good atmosphere, break the ice or fill the time when everybody is waiting for food. I include here some of these light-weight speeches just as something useful to copy and paste in case my readers need some nice words at a social event.
Lectures given to a specific audience, normally on invitation by an academic or public institution, are different. Here I wanted to produce a message, and I wanted to be heard and I wanted to convince. My feeling is that I was rather successful in getting the attention of my audience. If I could ever convince anybody who had different views before hearing me is at least unproven.
List of Speeches and Lectures in ENGLISH (latest come first))