He began the work in 1831 but did not complete it until 1841.
The change is not expected to be completed until early next year.
Building began in the 14th century and was not completed until the 16th.
Work was started in 1897 but not completed until 1901, the year he died.
Building began in 1909, but the west end was not completed until 1935.
The work started in 1941, but was not completed until 1960.
But county officials have said the plan would not be completed until 2005.
Federal officials say the studies will not be completed until 1993 or 1994.
The first road to the site was not completed until 1933.
As a result, the work was not completed until the 1880s.