MILAN (Reuters) – Shareholders in state-owned Monte dei Paschi di Siena (MPS) on Thursday approved a 2.5 billion euro ($2.5 billion) cash call. Here is a timeline of key events in the recent history of MPS, whose origins can be traced back to the 15th century. NOVEMBER 2007 – MPS buys Antonveneta from Santander for 9 billion euros in cash, just months after the Spanish bank paid 6.6 billion euros for it. JANUARY 2008 – MPS announces a 5 billion euros rights issue, a 950 million euro capital increase reserved to JPMorgan, a 2.16 billion euro Tier2 bond and a 1.56 billion euro bridge loan to fun…