1.1.0 1.1 1.2 1.3 Block 0. Main chain. 2009-01-03. Hash 000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f. Block explorer
 

Reuters' reference on The Financial Times article (archive.org cached copy)
 

http://bitcoin.stackexchange.com/questions/10009/why-can-t-the-genesis-block-coinbase-be-spent
 

https://www.reddit.com/r/Bitcoin/comments/1nc13r/the_first_50btc_block_reward_cant_be_spend_why/
 

https://github.com/bitcoin/bitcoin/blob/9546a977d354b2ec6cd8455538e68fe4ba343a44/src/main.cpp#L1668 - Genesis block transaction treated as a special case in the reference code