peace of mind - the absence of mental stress or anxiety. ataraxis, peacefulness, repose, serenity, peace, heartsease. quietude, quietness, tranquillity, tranquility - a state of peace and quiet. Translations.
says: 05/22/2015 at 11:09pm. The oldest COMPLETED building in Manhattan is not St. Paulâs Chapel, but rather the original house of the Morris Jumel Mansion, completed in 1765. Construction on St. Paulâs was begun a year earlier (1764), but finished a year later (1766) than the Morris Jumel Mansion.
1 Constructed in 1610, the Palace of the Governors in Santa Fe is the oldest seat of government in the United States.  On July 16, 1945, the worldâs first atomic bomb was tested at the Trinity Site in central New Mexico.