Definition of "colonnaded"

But the troubles at Credit Suisse — whose colonnaded headquarters in Zurich are more than 5,800 miles from Silicon Valley Bank’s base in California — are separate and largely of its own making.

2023 March 15, Michael J. de la Merced, Maureen Farrell, “Credit Suisse to Borrow Up to $54 Billion From Central Bank”, in The New York Times‎