3 questions, each answered from published authorities with the sources listed.
Photo montage: Benedikt Aron, from originals by Pjt56, Hedwig Storch, Luc Van Braekel, Bjørn Giesenbauer and Napoleon tnt, via Wikimedia Commons, CC BY-SA 4.0AuthorBenedikt Aron, from original images by Pjt56, Hedwig Storch, Luc Van Braekel, Bjørn Giesenbauer and Napoleon tnt · CC BY-SA 4.0File source