Question: Migliorino Ubaldini designed fortifications for the castle in what Scottish county?

Context paragraphs:
Carlos de Grunenbergh: Carlos de Grunenbergh, also known as Carlo Grunenberg, was a Flemish architect and military engineer active in the late 17th century.  He mainly designed fortifications in Sicily and Malta.  He was also a member of the Order of Saint John.

Antonio Ferramolino: Antonio Ferramolino was a 16th-century Italian architect and military engineer.  He is also known as Sferrandino da Bergamo, and is called Hernan Molin in Spanish sources.  He is mostly known for his work in Sicily, but he also designed fortifications in Croatia and Malta.

Amisfield railway station: Amisfield railway station was a station which served Amisfield, in the Scottish county of Dumfries and Galloway.  It was served by trains on a local line which ran between the Caledonian Main Line (now known as the West Coast Main Line) at Lockerbie and the Castle Douglas and Dumfries Railway at Dumfries .  The latter station is now the nearest to Amisfield.

Locharbriggs railway station: Locharbriggs railway station was a station which served Locharbriggs, in the Scottish county of Dumfries and Galloway.  It was served by trains on a local line which ran between the Caledonian Main Line (now known as the West Coast Main Line) at Lockerbie and the Castle Douglas and Dumfries Railway at Dumfries .

Dunbar Castle: Dunbar Castle is the remnants of one of the strongest fortresses in Scotland, situated in a prominent position overlooking the harbour of the town of Dunbar, in East Lothian.

Migliorino Ubaldini: Migliorino Ubaldini (active 1548), known also as "Captain Mellerin," was an Italian military engineer working in Scotland.  He designed new fortifications at the entrances of Edinburgh Castle, Dunbar Castle, and possibly the walled town of Leith.

Shieldhill railway station: Shieldhill railway station was a station which served Shieldhill, in the Scottish county of Dumfries and Galloway.  It was served by trains on a local line which ran between the Caledonian Main Line (now known as the West Coast Main Line) at Lockerbie and the Castle Douglas and Dumfries Railway at Dumfries .

Hans Alexis von Biehler: Hans Alexis von Biehler (June 16, 1818 - December 30, 1886) - was a Prussian general.  He designed fortifications in many famous locations.  Beginning in 1873, he saw fort construction in Cologne, Strasbourg, Poznań, Toruń, Königsberg, Ingolstadt, Metz, Kostrzyn, Spandau, Ulm, Mainz and Magdeburg.

Meigle railway station: Meigle railway station served the village of Meigle in the Scottish county of Perth and Kinross.  The station was on the Alyth Railway from Alyth Junction on the Scottish Midland Junction Railway running between Perth and Arbroath .

Lochmaben railway station: Lochmaben railway station was a station which served Lochmaben, in the Scottish county of Dumfries and Galloway.  It was served by trains on a local line which ran between the Caledonian Main Line (now known as the West Coast Main Line) at Lockerbie and the Castle Douglas and Dumfries Railway at Dumfries .

Supporting paragraphs: Migliorino Ubaldini Dunbar Castle
Answer: East Lothian