When was the last time your SQL Server database was restored

Here is the answer. The information is stored in the MSDB database.

DECLARE @dbname sysname, @days int
SET @dbname = NULL --substitute for whatever database name you want
SET @days = -30 --previous number of days, script will default to 30
SELECT
 rsh.destination_database_name AS [Database],
 rsh.user_name AS [Restored By],
 CASE WHEN rsh.restore_type = 'D' THEN 'Database'
  WHEN rsh.restore_type = 'F' THEN 'File'
  WHEN rsh.restore_type = 'G' THEN 'Filegroup'
  WHEN rsh.restore_type = 'I' THEN 'Differential'
  WHEN rsh.restore_type = 'L' THEN 'Log'
  WHEN rsh.restore_type = 'V' THEN 'Verifyonly'
  WHEN rsh.restore_type = 'R' THEN 'Revert'
  ELSE rsh.restore_type 
 END AS [Restore Type],
 rsh.restore_date AS [Restore Started],
 bmf.physical_device_name AS [Restored From], 
 rf.destination_phys_name AS [Restored To]
FROM msdb.dbo.restorehistory rsh
 INNER JOIN msdb.dbo.backupset bs ON rsh.backup_set_id = bs.backup_set_id
 INNER JOIN msdb.dbo.restorefile rf ON rsh.restore_history_id = rf.restore_history_id
 INNER JOIN msdb.dbo.backupmediafamily bmf ON bmf.media_set_id = bs.media_set_id
WHERE rsh.restore_date >= DATEADD(dd, ISNULL(@days, -30), GETDATE()) --want to search for previous days
AND destination_database_name = ISNULL(@dbname, destination_database_name) --if no dbname, then return all
ORDER BY rsh.restore_history_id DESC
GO

http://www.mssqltips.com/sqlservertip/1724/when-was-the-last-time-your-sql-server-database-was-restored/