Answer
Article 127 TFEU; the primary objective is to maintain price stability.
💡Art. 127(2) lists the basic tasks; complemented by Arts 128–133 TFEU and Protocol No. 4 (ESCB/ECB Statute).
Consolidated TFEU (EUR-Lex) — eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:12016E/TXT