Short answer
Partly true. In the early ninth century Charlemagne issued a capitulary (the Capitulare de villis) that ordered what should be kept and how things on royal estates were to be managed, and it specifically mentions animals such as geese. That makes his legislation among the earliest systematic medieval European rules we have about keeping and managing livestock, including geese — but he was not the first human ever to give instructions about breeding geese (ancient Roman authors had farming advice), so the statement needs the historical nuance below.
Step‑by‑step explanation
- Who was Charlemagne?
Charlemagne (c. 742–814) was king of the Franks and Lombards and later Emperor of the Romans. He centralized administration of his large realm and issued laws and instructions (capitularies) to govern royal domains and society.
- What is the Capitulare de villis?
The Capitulare de villis vel curtis imperii (usually dated to about 812) is a set of detailed instructions for the management of the royal estates (villas/curtes). It lists plants, animals, and duties for estate stewards and servants, specifying what should be kept and how to look after it. It is one of the best‑known administrative documents from the Carolingian court.
- Does the capitulary mention geese?
Yes. The text includes lists of animals and practical instructions for their care; geese (Latin: anseres or similar) are among the domestic fowl mentioned. The inclusion shows that the crown expected a standardized approach to keeping and using geese on royal estates (for meat, eggs, and perhaps guarding functions).
- Why is this important?
Two reasons:
- It is an early example in medieval Europe of centralized regulation of husbandry — not just local custom but a written instruction from the ruler.
- It shows the practical, economic side of Carolingian governance: ensuring supplies for the court and managing estate productivity.
- Caveats — was Charlemagne literally the first?
Not absolutely. Agricultural and animal‑husbandry advice existed much earlier (ancient Roman authors such as Varro, Columella and Pliny wrote on the keeping of geese and other animals). What is accurate is that Charlemagne’s capitulary represents one of the first systematic, written regulations from a medieval European ruler about the management of livestock on royal estates.
Where to look for the sources
- Primary: Capitulare de villis vel curtis imperii (editions in Monumenta Germaniae Historica). Look for English translations or editions in collections of Carolingian capitularies.
- Secondary: general Carolingian histories such as works by Rosamond McKitterick and other medievalists discuss the capitularies and royal estate management.
Conclusion
So the simple claim that "In Europe, it was Charlemagne who first regulated the breeding of geese" is broadly defensible if you mean "in early medieval Europe, Charlemagne issued the earliest well‑known written royal regulations concerning geese". But it should not be read as saying he was the very first person in history to regulate goose breeding — agricultural knowledge and rules existed earlier in antiquity and in local practice.
If you want, I can quote or summarize the exact passages from the Capitulare de villis that mention geese and explain what they prescribe.