Yes. You deduct the FMV, not the basis. There are some limits on deductions, especially when giving to foundations you control. But you can be sure that the don

Yes. You deduct the FMV, not the basis. There are some limits on deductions, especially when giving to foundations you control. But you can be sure that the donor has been well-advised on matching up this enormous deduction with similarly-sized realization events (i.e., selling other assets and generating taxable gains).