It took 22 years to build it, they began building it in 1631 and it was completed in 1653 and there were 20,000 workers who helped. To build it there it costed 32 million rupees. Taj Mahal means crown palace. It was the grave of Mumtaz Mahal at the lower chamber, the grave of Shah Jahan was added to it later.
A piece of surfaced (sanded smooth) 2×4 lumber actually measures 1½ inches thick and 3½ inches wide. In rough-cut condition, a 2×4 is slightly less than 2 inches thick and approximately 4 inches wide. When wood is milled from a rough to a smooth surface, it loses about ¼-inch from each of its four sides.
Mother robins may start incubating their eggs during the evening after the second egg is laid, or after all the eggs are laid. They sit on the eggs for 12 to 14 days. The female usually does all the incubating. Even in good weather, she rarely leaves her eggs for more than 5 to 10 minutes at a time.