Over the years, the Castle has been home to the Smithsonian Institution Archives and the Woodrow Wilson International Center for Scholars. Today, the Castle houses the Institution's administrative offices and the Smithsonian Information Center.
Withdrawals made after age 59 and 1/2 are normal retirement withdrawals and are not taxed. You paid tax on that income when you first contributed to the Roth IRA. If the withdrawal is made before age 59 and 1/2 and is only up to the amount that has been contributed to the Roth IRA then no income tax is charged. Withdrawals of contributions are tax-free.
You do not have to pay any taxes on the earnings in a Roth IRA as long as you've had an account open for 5 years and wait until age 59 1/2 to take out the earnings. Your original Roth IRA contributions (but not earnings) can also be withdrawn tax-free before retirement.