 Complete the following phrase:  The keel for Aspern was laid down at the Pola Arsenal on 4 October 1897 under the contract name Kreuzer B, also designated Ersatz replacement for the elderly sloop-of-war. Her completed hull was launched on 3 May 1899 and fitting out was completed by 29 May 1900, when she was commissioned into the fleet at a cost of 4.5 million krone. She was named for the 