Noah. He had a wife and three sons, Shem, Ham, and Japheth, and each of his sons had a wife. Jehovah told Noah to build a big ark so that he and his family could survive the Flood. An ark is a huge box that can float on water. Jehovah also told Noah to bring many animals inside the ark so that they could survive too.
The Bible does not say how long it took Noah to build the ark, but it seems that he spent several decades building it. Noah was more than 500 years old when his first son was born, and he was 600 years old when the Flood occurred. b—Genesis 5:32; 7:6.
God told Noah to build the ark after his three sons were grown and married, which could have taken some 50 or 60 years. (Genesis 6:14, 18) Based on this possibility, it seems reasonable to conclude that the ark could have taken 40 or 50 years to complete.
The Bible gives specific details about the Flood. The Bible account of the Flood does not begin with anything like “Once upon a time,” as if it were a fairy tale. Rather, the Bible states the year, the month, and the day that events connected with the Flood happened. (Genesis 7:11; 8:4, 13, 14) It also gives the dimensions of the ark that Noah built. (Genesis 6:15) These details show that the Bible presents the Flood as a fact, not as a fable.